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Mozilla has released security updates to address two critical security flaws in its Firefox browser that could be potentially exploited to access sensitive data or achieve code execution. The vulnerabilities, both of which were exploited as a zero-day at Pwn2Own Berlin, are listed below - CVE-2025-4918 - An out-of-bounds access vulnerability when resolving Promise objects that could allow an attacker to perform read or write on a JavaScript Promise object CVE-2025-4919 - An out-of-bounds access vulnerability when optimizing linear sums that could allow an attacker to perform read or write on a JavaScript object by confusing array index sizes In other words, successful exploitation of either of the flaws could permit an adversary to achieve out-of-bounds read or write , which could then be abused to access otherwise sensitive information or result in memory corruption that could pave the way for code execution. The vulnerabilities affect the following versions of the Firefox b...

Google on Wednesday released updates to address four security issues in its Chrome web browser, including one for which it said there exists an exploit in the wild. The high-severity vulnerability, tracked as CVE-2025-4664 (CVSS score: 4.3), has been characterized as a case of insufficient policy enforcement in a component called Loader. "Insufficient policy enforcement in Loader in Google Chrome prior to 136.0.7103.113 allowed a remote attacker to leak cross-origin data via a crafted HTML page," according to a description of the flaw. The tech giant credited security researcher Vsevolod Kokorin (@slonser_) with detailing the flaw in X on May 5, 2025, adding it's aware "an exploit for CVE-2025-4664 exists in the wild." "Unlike other browsers, Chrome resolves the Link header on sub-resource requests," Kokorin said in a series of posts on X earlier this month. "The issue is that the Link header can set a referrer-policy. We can specify uns...

Cybersecurity researchers have discovered a new phishing campaign that's being used to distribute malware called Horabot targeting Windows users in Latin American countries like Mexico, Guatemala, Colombia, Peru, Chile, and Argentina. The campaign is "using crafted emails that impersonate invoices or financial documents to trick victims into opening malicious attachments and can steal email credentials, harvest contact lists, and install banking trojans," Fortinet FortiGuard Labs researcher Cara Lin said . The activity, observed by the network security company in April 2025, has primarily singled out Spanish-speaking users. The attacks have also been found to send phishing messages from victims' mailboxes using Outlook COM automation, effectively propagating the malware laterally within corporate or personal networks. In addition, the threat actors behind the campaign execute various VBScript, AutoIt, and PowerShell scripts to conduct system reconnaissance, stea...

The North Korean threat actors behind the Contagious Interview campaign have been observed using updated versions of a cross-platform malware called OtterCookie with capabilities to steal credentials from web browsers and other files. NTT Security Holdings, which detailed the new findings, said the attackers have "actively and continuously" updated the malware, introducing versions v3 and v4 in February and April 2025, respectively. The Japanese cybersecurity company is tracking the cluster under the name WaterPlum , which is also known as CL-STA-0240, DeceptiveDevelopment, DEV#POPPER, Famous Chollima, PurpleBravo, and Tenacious Pungsan. OtterCookie was first documented by NTT last year after having observed it in attacks since September 2024. Delivered by means of a JavaScript payload via a malicious npm package, trojanized GitHub or Bitbucket repository, or a bogus videoconferencing app, it's designed to contact an external server to execute commands on compromis...

Security Service Edge (SSE) platforms have become the go-to architecture for securing hybrid work and SaaS access. They promise centralized enforcement, simplified connectivity, and consistent policy control across users and devices. But there's a problem: they stop short of where the most sensitive user activity actually happens—the browser. This isn't a small omission. It's a structural limitation. And it's leaving organizations exposed in the one place they can't afford to be: the last mile of user interaction. A new report Reevaluating SSEs: A Technical Gap Analysis of Last-Mile Protection analyzing gaps in SSE implementations reveals where current architectures fall short—and why many organizations are reevaluating how they protect user interactions inside the browser. The findings point to a fundamental visibility challenge at the point of user action. SSEs deliver value for what they're designed to do—enforce network-level policies and route traffic securely between en...

The threat actors known as Golden Chickens have been attributed to two new malware families dubbed TerraStealerV2 and TerraLogger, suggesting continued development efforts to fine-tune and diversify their arsenal. "TerraStealerV2 is designed to collect browser credentials, cryptocurrency wallet data, and browser extension information," Recorded Future Insikt Group said . "TerraLogger, by contrast, is a standalone keylogger. It uses a common low-level keyboard hook to record keystrokes and writes the logs to local files." Golden Chickens, also known as TA4557 and Venom Spider, is the name given to a financially motivated threat actor linked to a notorious malware family called More_eggs . It's known to be active since at least 2018, offering its warez under a malware-as-a-service (MaaS) model. Campaigns distributing More_eggs entail the use of spear-phishing emails to target hiring managers using fake resumes, allowing attackers to steal confidential data. ...

Various generative artificial intelligence (GenAI) services have been found vulnerable to two types of jailbreak attacks that make it possible to produce illicit or dangerous content. The first of the two techniques, codenamed Inception, instructs an AI tool to imagine a fictitious scenario, which can then be adapted into a second scenario within the first one where there exists no safety guardrails . "Continued prompting to the AI within the second scenarios context can result in bypass of safety guardrails and allow the generation of malicious content," the CERT Coordination Center (CERT/CC) said in an advisory released last week. The second jailbreak is realized by prompting the AI for information on how not to reply to a specific request.  "The AI can then be further prompted with requests to respond as normal, and the attacker can then pivot back and forth between illicit questions that bypass safety guardrails and normal prompts," CERT/CC added. Success...

Phishing attacks remain a huge challenge for organizations in 2025. In fact, with attackers increasingly leveraging identity-based techniques over software exploits, phishing arguably poses a bigger threat than ever before.  Attackers are increasingly leveraging identity-based techniques over software exploits, with phishing and stolen credentials (a byproduct of phishing) now the primary cause of breaches. Source: Verizon DBIR Attackers are increasingly leveraging identity-based techniques over software exploits, with phishing and stolen credentials (a byproduct of phishing) now the primary cause of breaches. Source: Verizon DBIR Attackers are turning to identity attacks like phishing because they can achieve all of the same objectives as they would in a traditional endpoint or network attack, simply by logging into a victim's account. And with organizations now using hundreds of internet apps across their workforce, the scope of accounts that can be phished or targeted with s...

The China-linked cyber espionage group tracked as Lotus Panda has been attributed to a campaign that compromised multiple organizations in an unnamed Southeast Asian country between August 2024 and February 2025. "Targets included a government ministry, an air traffic control organization, a telecoms operator, and a construction company," the Symantec Threat Hunter Team said in a new report shared with The Hacker News. "The attacks involved the use of multiple new custom tools, including loaders, credential stealers, and a reverse SSH tool." The intrusion set is also said to have targeted a news agency located in another country in Southeast Asia and an air freight organization located in another neighboring country.  The threat cluster, per Broadcom's cybersecurity division, is assessed to be a continuation of a campaign that was disclosed by the company in December 2024 as targeting various high-profile organizations in Southeast Asia since at least Oct...

The Computer Emergency Response Team of Ukraine (CERT-UA) has revealed a new set of cyber attacks targeting Ukrainian institutions with information-stealing malware. The activity is aimed at military formations, law enforcement agencies, and local self-government bodies, particularly those located near Ukraine's eastern border, the agency said. The attacks involve distributing phishing emails containing a macro-enabled Microsoft Excel spreadsheet (XLSM), which, when opened, facilities the deployment of two pieces of malware, a PowerShell script taken from the PSSW100AVB ("Powershell Scripts With 100% AV Bypass") GitHub repository that opens a reverse shell, and a previously undocumented stealer dubbed GIFTEDCROOK. "File names and email subject lines reference relevant and sensitive issues such as demining, administrative fines, UAV production, and compensation for destroyed property," CERT-UA said. "These spreadsheets contain malicious code which, ...

Every week, someone somewhere slips up—and threat actors slip in. A misconfigured setting, an overlooked vulnerability, or a too-convenient cloud tool becomes the perfect entry point. But what happens when the hunters become the hunted? Or when old malware resurfaces with new tricks? Step behind the curtain with us this week as we explore breaches born from routine oversights—and the unexpected cracks they reveal in systems we trust. ⚡ Threat of the Week Google Patches Actively Exploited Chrome 0-Day — Google has addressed a high-severity security flaw in its Chrome browser for Windows that has been exploited by unknown actors as part of a sophisticated attack aimed at Russian entities. The flaw, CVE-2025-2783 (CVSS score: 8.3), is said to have been combined with another exploit to break out of the browser's sandbox and achieve remote code execution. The attacks involved distributing specially crafted links via phishing emails that, when clicked and launched using Chrome, trig...

Mozilla has released updates to address a critical security flaw impacting its Firefox browser for Windows, merely days after Google patched a similar flaw in Chrome that came under active exploitation as a zero-day. The security vulnerability, CVE-2025-2857, has been described as a case of an incorrect handle that could lead to a sandbox escape. "Following the recent Chrome sandbox escape (CVE-2025-2783), various Firefox developers identified a similar pattern in our IPC [inter-process communication] code," Mozilla said in an advisory. "A compromised child process could cause the parent process to return an unintentionally powerful handle, leading to a sandbox escape." The shortcoming, which affects Firefox and Firefox ESR, has been addressed in Firefox 136.0.4, Firefox ESR 115.21.1, and Firefox ESR 128.8.1. There is no evidence that CVE-2025-2857 has been exploited in the wild. The Tor Project has also shipped a security update for the Tor Browser (versio...