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The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has urged federal agencies to patch the recent React2Shell vulnerability by December 12, 2025, amid reports of widespread exploitation. The critical vulnerability, tracked as CVE-2025-55182 (CVSS score: 10.0), affects the React Server Components (RSC) Flight protocol. The underlying cause of the issue is an unsafe deserialization that allows an attacker to inject malicious logic that the server executes in a privileged context. It also affects other frameworks, including Next.js, Waku, Vite, React Router, and RedwoodSDK. "A single, specially crafted HTTP request is sufficient; there is no authentication requirement, user interaction, or elevated permissions involved," Cloudforce One, Cloudflare's threat intelligence team, said . "Once successful, the attacker can execute arbitrary, privileged JavaScript on the affected server." Since its public disclosure on December 3, 2025, the shortcoming...

A high-severity unpatched security vulnerability in Gogs has come under active exploitation, with more than 700 compromised instances accessible over the internet, according to new findings from Wiz. The flaw, tracked as CVE-2025-8110 (CVSS score: 8.7), is a case of file overwrite in the file update API of the Go-based self-hosted Git service. A fix for the issue is said to be currently in the works. The company said it accidentally discovered the zero-day flaw in July 2025 while investigating a malware infection on a customer's machine. "Improper symbolic link handling in the PutContents API in Gogs allows local execution of code," according to a description of the vulnerability in CVE.org. The cloud security company said CVE-2025-8110 is a bypass for a previously patched remote code execution flaw ( CVE-2024-55947 , CVSS score: 8.7) that allows an attacker to write a file to an arbitrary path on the server and gain SSH access to the server. CVE-2024-55947 was add...

Cloud security is changing. Attackers are no longer just breaking down the door; they are finding unlocked windows in your configurations, your identities, and your code. Standard security tools often miss these threats because they look like normal activity. To stop them, you need to see exactly how these attacks happen in the real world. Next week, the Cortex Cloud team at Palo Alto Networks is hosting a technical deep dive to walk you through three recent investigations and exactly how to defend against them. Secure your spot for the live session ➜ What Experts Will Cover This isn't a high-level overview. We are looking at specific, technical findings from the field. In this session, our experts will break down three distinct attack vectors that are bypassing traditional security right now: AWS Identity Misconfigurations: We will show how attackers abuse simple setup errors in AWS identities to gain initial access without stealing a single password. Hiding in A...

Threat actors with ties to North Korea have likely become the latest to exploit the recently disclosed critical React2Shell security flaw in React Server Components (RSC) to deliver a previously undocumented remote access trojan dubbed EtherRAT . "EtherRAT leverages Ethereum smart contracts for command-and-control (C2) resolution, deploys five independent Linux persistence mechanisms, and downloads its own Node.js runtime from nodejs.org," Sysdig said in a report published Monday. The cloud security firm said the activity exhibits significant overlap with a long-running campaign codenamed Contagious Interview , which has been observed leveraging the EtherHiding technique to distribute malware since February 2025. Contagious Interview is the name given to a series of attacks in which blockchain and Web3 developers, among others, are targeted through fake job interviews, coding assignments, and video assessments, leading to the deployment of malware. These efforts typi...

It's been a week of chaos in code and calm in headlines. A bug that broke the internet's favorite framework, hackers chasing AI tools, fake apps stealing cash, and record-breaking cyberattacks — all within days. If you blink, you'll miss how fast the threat map is changing. New flaws are being found, published, and exploited in hours instead of weeks. AI-powered tools meant to help developers are quickly becoming new attack surfaces. Criminal groups are recycling old tricks with fresh disguises — fake apps, fake alerts, and fake trust. Meanwhile, defenders are racing to patch systems, block massive DDoS waves, and uncover spy campaigns hiding quietly inside networks. The fight is constant, the pace relentless. For a deeper look at these stories, plus new cybersecurity tools and upcoming expert webinars, check out the full ThreatsDay Bulletin. ⚡ Threat of the Week Max Severity React Flaw Comes Under Attack — A critical security flaw impacting React Server Components (RSC) has ...

Two hacking groups with ties to China have been observed weaponizing the newly disclosed security flaw in React Server Components (RSC) within hours of it becoming public knowledge. The vulnerability in question is CVE-2025-55182 (CVSS score: 10.0), aka React2Shell , which allows unauthenticated remote code execution . It has been addressed in React versions 19.0.1, 19.1.2, and 19.2.1. According to a new report shared by Amazon Web Services (AWS), two China-linked threat actors known as Earth Lamia and Jackpot Panda have been observed attempting to exploit the maximum-severity security flaw. "Our analysis of exploitation attempts in AWS MadPot honeypot infrastructure has identified exploitation activity from IP addresses and infrastructure historically linked to known China state-nexus threat actors," CJ Moses, CISO of Amazon Integrated Security, said in a report shared with The Hacker News. Specifically, the tech giant said it identified infrastructure associated wit...

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Thursday released details of a backdoor named BRICKSTORM that has been put to use by state-sponsored threat actors from the People's Republic of China (PRC) to maintain long-term persistence on compromised systems. "BRICKSTORM is a sophisticated backdoor for VMware vSphere and Windows environments," the agency said . "BRICKSTORM enables cyber threat actors to maintain stealthy access and provides capabilities for initiation, persistence, and secure command-and-control." Written in Golang, the custom implant essentially gives bad actors interactive shell access on the system and allows them to browse, upload, download, create, delete, and manipulate files The malware, mainly used in attacks targeting governments and information technology (IT) sectors, also supports multiple protocols, such as HTTPS, WebSockets, and nested Transport Layer Security (TLS), for command-and-control (C2), DNS-o...

A maximum-severity security flaw has been disclosed in React Server Components (RSC) that, if successfully exploited, could result in remote code execution. The vulnerability, tracked as CVE-2025-55182, carries a CVSS score of 10.0. The vulnerability has been codenamed React2shell . It allows "unauthenticated remote code execution by exploiting a flaw in how React decodes payloads sent to React Server Function endpoints," the React Team said in an alert issued today. "Even if your app does not implement any React Server Function endpoints, it may still be vulnerable if your app supports React Server Components." According to cloud security firm Wiz , the issue is a case of logical deserialization that stems from processing RSC payloads in an unsafe manner. As a result, an unauthenticated attacker could craft a malicious HTTP request to any Server Function endpoint that, when deserialized by React, achieves execution of arbitrary JavaScript code on the server. ...

Hackers aren't kicking down the door anymore. They just use the same tools we use every day — code packages, cloud accounts, email, chat, phones, and "trusted" partners — and turn them against us. One bad download can leak your keys. One weak vendor can expose many customers at once. One guest invite, one link on a phone, one bug in a common tool, and suddenly your mail, chats, repos, and servers are in play. Every story below is a reminder that your "safe" tools might be the real weak spot. ⚡ Threat of the Week Shai-Hulud Returns with More Aggression — The npm registry was targeted a second time by a self-replicating worm that went by the moniker "Sha1-Hulud: The Second Coming," affecting over 800 packages and 27,000 GitHub repositories. Like in the previous iteration, the main objective was to steal sensitive data like API keys, cloud credentials, and npm and GitHub authentication information, and facilitate deeper supply chain compromise in a worm-like fashion. Th...

As IT environments become increasingly distributed and organizations adopt hybrid and remote work at scale, traditional perimeter-based security models and on-premises Privileged Access Management (PAM) solutions no longer suffice. IT administrators, contractors and third-party vendors now require secure access to critical systems from any location and on any device, without compromising compliance or increasing security risks. To keep up with modern demands, many organizations are turning to Remote Privileged Access Management (RPAM) for a cloud-based approach to securing privileged access that extends protection beyond on-prem environments to wherever privileged users connect. Continue reading to learn more about RPAM, how it differs from traditional PAM and why RPAM adoption is growing across all industries. What is RPAM? Remote Privileged Access Management (RPAM) allows organizations to securely monitor and manage privileged access for remote and third-party users. Unlike trad...

Cybersecurity researchers have shed light on a cross-tenant blind spot that allows attackers to bypass Microsoft Defender for Office 365 protections via the guest access feature in Teams. "When users operate as guests in another tenant, their protections are determined entirely by that hosting environment, not by their home organization," Ontinue security researcher Rhys Downing said in a report. "These advancements increase collaboration opportunities, but they also widen the responsibility for ensuring those external environments are trustworthy and properly secured." The development comes as Microsoft has begun rolling out a new feature in Teams that allows users to chat with anyone via email, including those who don't use the enterprise communications platform, starting this month. The change is expected to be globally available by January 2026. "The recipient will receive an email invitation to join the chat session as a guest, enabling seamles...

Microsoft has announced plans to improve the security of Entra ID authentication by blocking unauthorized script injection attacks starting a year from now. The update to its Content Security Policy (CSP) aims to enhance the Entra ID sign-in experience at "login.microsoftonline[.]com" by only letting scripts from trusted Microsoft domains run. "This update strengthens security and adds an extra layer of protection by allowing only scripts from trusted Microsoft domains to run during authentication, blocking unauthorized or injected code from executing during the sign-in experience," the Windows maker said . Specifically, it only allows script downloads from Microsoft trusted CDN domains and inline script execution from a Microsoft trusted source. The updated policy is limited to browser-based sign-in experiences for URLs beginning with login.microsoftonline.com. Microsoft Entra External ID will not be affected. The change, which has been described as a proacti...

Gainsight has disclosed that the recent suspicious activity targeting its applications has affected more customers than previously thought. The company said Salesforce initially provided a list of 3 impacted customers and that it has "expanded to a larger list" as of November 21, 2025. It did not reveal the exact number of customers who were impacted, but its CEO, Chuck Ganapathi, said "we presently know of only a handful of customers who had their data affected." The development comes as Salesforce warned of detected "unusual activity" related to Gainsight-published applications connected to the platform, prompting the company to revoke all access and refresh tokens associated with them. The breach has been claimed by a notorious cybercrime group known as ShinyHunters (aka Bling Libra). A number of other precautionary steps have been enacted to contain the incident. This includes Zendesk, Gong.io, and HubSpot temporarily suspending their Gainsight...

The second wave of the Shai-Hulud supply chain attack has spilled over to the Maven ecosystem after compromising more than 830 packages in the npm registry. The Socket Research Team said it identified a Maven Central package named org.mvnpm:posthog-node:4.18.1 that embeds the same two components associated with Sha1-Hulud: the "setup_bun.js" loader and the main payload "bun_environment.js." The company told The Hacker News that org.mvnpm:posthog-node:4.18.1 was the only Java package identified so far. "This means the PostHog project has compromised releases in both the JavaScript/npm and Java/Maven ecosystems, driven by the same Shai Hulud v2 payload," the cybersecurity company said in a Tuesday update. It's worth noting that the Maven Central package is not published by PostHog itself. Rather, the "org.mvnpm" coordinates are generated via an automated mvnpm process that rebuilds npm packages as Maven artifacts. The Maven Central said...

New research has found that organizations in various sensitive sectors, including governments, telecoms, and critical infrastructure, are pasting passwords and credentials into online tools like JSONformatter and CodeBeautify that are used to format and validate code. Cybersecurity company watchTowr Labs said it captured a dataset of over 80,000 files on these sites, uncovering thousands of usernames, passwords, repository authentication keys, Active Directory credentials, database credentials, FTP credentials, cloud environment keys, LDAP configuration information, helpdesk API keys, meeting room API keys, SSH session recordings, and all kinds of personal information. This includes five years of historical JSONFormatter content and one year of historical CodeBeautify content, totalling over 5GB worth of enriched, annotated JSON data. Organizations impacted by the leak span critical national infrastructure, government, finance, insurance, banking, technology, retail, aerospace, t...

Cybersecurity researchers have discovered five vulnerabilities in Fluent Bit , an open-source and lightweight telemetry agent, that could be chained to compromise and take over cloud infrastructures. The security defects "allow attackers to bypass authentication, perform path traversal, achieve remote code execution, cause denial-of-service conditions, and manipulate tags," Oligo Security said in a report shared with The Hacker News. Successful exploitation of the flaws could enable attackers to disrupt cloud services, manipulate data, and burrow deeper into cloud and Kubernetes infrastructure. The list of identified vulnerabilities is as follows - CVE-2025-12972 - A path traversal vulnerability stemming from the use of unsanitized tag values to generate output filenames, making it possible to write or overwrite arbitrary files on disk, enabling log tampering and remote code execution. CVE-2025-12970 - A stack buffer overflow vulnerability in the Docker Metrics inp...

Multiple security vendors are sounding the alarm about a second wave of attacks targeting the npm registry in a manner that's reminiscent of the Shai-Hulud attack . The new supply chain campaign, dubbed Sha1-Hulud , has compromised hundreds of npm packages, according to reports from Aikido , HelixGuard , JFrog , Koi Security , ReversingLabs , SafeDep , Socket , Step Security , and Wiz . The trojanized npm packages were uploaded to npm between November 21 and 23, 2025. The attack has impacted popular packages from Zapier, ENS Domains, PostHog, and Postman, among others. "The campaign introduces a new variant that executes malicious code during the preinstall phase, significantly increasing potential exposure in build and runtime environments," Wiz researchers Hila Ramati, Merav Bar, Gal Benmocha, and Gili Tikochinski said. Like the Shai-Hulud attack that came to light in September 2025, the latest activity also publishes stolen secrets to GitHub, this time with the rep...

This week saw a lot of new cyber trouble. Hackers hit Fortinet and Chrome with new 0-day bugs. They also broke into supply chains and SaaS tools. Many hid inside trusted apps, browser alerts, and software updates. Big firms like Microsoft, Salesforce, and Google had to react fast — stopping DDoS attacks, blocking bad links, and fixing live flaws. Reports also showed how fast fake news, AI risks, and attacks on developers are growing. Here's what mattered most in security this week. ⚡ Threat of the Week Fortinet Warns of Another Silently Patched and Actively Exploited FortiWeb Flaw — Fortinet has warned that a new security flaw in FortiWeb has been exploited in the wild. The medium-severity vulnerability, tracked as CVE-2025-58034, carries a CVSS score of 6.7 out of a maximum of 10.0. It has been addressed in version 8.0.2. "An Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability [CWE-78] in FortiWeb may allow an a...

The China-linked advanced persistent threat (APT) group known as APT31 has been attributed to cyber attacks targeting the Russian information technology (IT) sector between 2024 and 2025 while staying undetected for extended periods of time. "In the period from 2024 to 2025, the Russian IT sector, especially companies working as contractors and integrators of solutions for government agencies, faced a series of targeted computer attacks," Positive Technologies researchers Daniil Grigoryan and Varvara Koloskova said in a technical report. APT31, also known as Altaire, Bronze Vinewood, Judgement Panda, PerplexedGoblin, RedBravo, Red Keres, and Violet Typhoon (formerly Zirconium), is assessed to be active since at least 2010. It has a track record of striking a wide range of sectors, including governments, financial, and aerospace and defense, high tech, construction and engineering, telecommunications, media, and insurance. The cyber espionage group is primarily focused ...