JavaScript | Breaking Cybersecurity News | The Hacker News

Elastic has rolled out security updates to address a critical security flaw impacting the Kibana data visualization dashboard software for Elasticsearch that could result in arbitrary code execution. The vulnerability, tracked as CVE-2025-25015 , carries a CVSS score of 9.9 out of a maximum of 10.0. It has been described as a case of prototype pollution. "Prototype pollution in Kibana leads to arbitrary code execution via a crafted file upload and specifically crafted HTTP requests," the company said in an advisory released Wednesday. Prototype pollution vulnerability is a security flaw that allows attackers to manipulate an application's JavaScript objects and properties, potentially leading to unauthorized data access, privilege escalation, denial-of-service, or remote code execution.  The vulnerability affects all versions of Kibana between 8.15.0 and 8.17.3. It has been addressed in version 8.17.3. That said, in Kibana versions from 8.15.0 and prior to 8.17....

Over 1,000 websites powered by WordPress have been infected with a third-party JavaScript code that injects four separate backdoors. "Creating four backdoors facilitates the attackers having multiple points of re-entry should one be detected and removed," c/side researcher Himanshu Anand said in a Wednesday analysis. The malicious JavaScript code has been found to be served via cdn.csyndication[.]com. As of writing, as many as 908 websites contain references to the domain in question. The functions of the four backdoors are explained below - Backdoor 1, which uploads and installs a fake plugin named "Ultra SEO Processor," which is then used to execute attacker-issued commands Backdoor 2, which injects malicious JavaScript into wp-config.php Backdoor 3, which adds an attacker-controlled SSH key to the ~/.ssh/authorized_keys file so as to allow persistent remote access to the machine Backdoor 4, which is designed to execute remote commands and fetches anot...

In cybersecurity, confidence is a double-edged sword. Organizations often operate under a false sense of security , believing that patched vulnerabilities, up-to-date tools, polished dashboards, and glowing risk scores guarantee safety. The reality is a bit of a different story. In the real world, checking the right boxes doesn't equal being secure. As Sun Tzu warned, "Strategy without tactics is the slowest route to victory. Tactics without strategy is the noise before defeat." Two and a half millennia later, the concept still holds: your organization's cybersecurity defenses must be strategically validated under real-world conditions to ensure your business's very survival. Today, more than ever, you need Adversarial Exposure Validation (AEV) , the essential strategy that's still missing from most security frameworks. The Danger of False Confidence Conventional wisdom suggests that if you've patched known bugs, deployed a stack of well-regarded security tools, and passed the nec...

Cybersecurity researchers have flagged a credit card stealing malware campaign that has been observed targeting e-commerce sites running Magento by disguising the malicious content within image tags in HTML code in order to stay under the radar. MageCart is the name given to a malware that's capable of stealing sensitive payment information from online shopping sites. The attacks are known to employ a wide range of techniques – both on client- and server-side – to compromise websites and deploy credit card skimmers to facilitate theft. Typically, such malware is only triggered or loaded when users visit the checkout pages to enter credit card details by either serving a fake form or capturing the information entered by the victims in real time. The term MageCart is a reference to the original target of these cybercrime groups, the Magento platform that offers checkout and shopping cart features for online retailers. Over the years, such campaigns adapted their tactics by conce...

The North Korean threat actor known as the Lazarus Group has been linked to a previously undocumented JavaScript implant named Marstech1 as part of limited targeted attacks against developers. The active operation has been dubbed Marstech Mayhem by SecurityScorecard, with the malware delivered by means of an open-source repository hosted on GitHub that's associated with a profile named "SuccessFriend." The profile, active since July 2024, is no longer accessible on the code hosting platform. The implant is designed to collect system information, and can be embedded within websites and NPM packages, posing a supply chain risk. Evidence shows that the malware first emerged in late December 2024. The attack has amassed 233 confirmed victims across the U.S., Europe, and Asia. "The profile mentioned web dev skills and learning blockchain which is in alignment to the interests of Lazarus," SecurityScorecard said . "The threat actor was committing both pre-o...

Threat actors have been observed leveraging Google Tag Manager (GTM) to deliver credit card skimmer malware targeting Magento-based e-commerce websites. Website security company Sucuri said the code, while appearing to be a typical GTM and Google Analytics script used for website analytics and advertising purposes, contains an obfuscated backdoor capable of providing attackers with persistent access. As of writing, as many as three sites have been found to be infected with the GTM identifier (GTM-MLHK2N68) in question, down from six reported by Sucuri. GTM identifier refers to a container that includes the various tracking codes (e.g., Google Analytics, Facebook Pixel) and rules to be triggered when certain conditions are met. Further analysis has revealed that the malware is being loaded from the Magento database table "cms_block.content," with the GTM tag containing an encoded JavaScript payload that acts as a credit card skimmer. "This script was designed to ...

The North Korea-linked Lazarus Group has been linked to an active campaign that leverages fake LinkedIn job offers in the cryptocurrency and travel sectors to deliver malware capable of infecting Windows, macOS, and Linux operating systems. According to cybersecurity company Bitdefender, the scam begins with a message sent on a professional social media network, enticing them with the promise of remote work, part-time flexibility, and good pay. "Once the target expresses interest, the 'hiring process' unfolds, with the scammer requesting a CV or even a personal GitHub repository link," the Romanian firm said in a report shared with The Hacker News. "Although seemingly innocent, these requests can serve nefarious purposes, such as harvesting personal data or lending a veneer of legitimacy to the interaction." Once the requested details are obtained, the attack moves to the next stage where the threat actor, under the guise of a recruiter, shares a lin...

The North Korean threat actors behind the Contagious Interview campaign have been observed delivering a collection of Apple macOS malware strains dubbed FERRET as part of a supposed job interview process. "Targets are typically asked to communicate with an interviewer through a link that throws an error message and a request to install or update some required piece of software such as VCam or CameraAccess for virtual meetings," SentinelOne researchers Phil Stokes and Tom Hegel said in a new report. Contagious Interview, first uncovered in late 2023, is a persistent effort undertaken by the hacking crew to deliver malware to prospective targets through bogus npm packages and native apps masquerading as videoconferencing software. It's also tracked as DeceptiveDevelopment and DEV#POPPER. These attack chains are designed to drop a JavaScript-based malware known as BeaverTail, which, besides harvesting sensitive data from web browsers and crypto wallets, is capable of d...

Cybersecurity researchers have disclosed a critical security flaw in the Lightning AI Studio development platform that, if successfully exploited, could have allowed for remote code execution. The vulnerability, rated a CVSS score of 9.4, enables "attackers to potentially execute arbitrary commands with root privileges" by exploiting a hidden URL parameter, application security firm Noma said in a report shared with The Hacker News. "This level of access could hypothetically be leveraged for a range of malicious activities, including the extraction of sensitive keys from targeted accounts," researchers Sasi Levi, Alon Tron, and Gal Moyal said. The issue is embedded in a piece of JavaScript code that could facilitate unfettered access to a victim's development environment, as well as run arbitrary commands on an authenticated target in a privileged context. Noma said it found a hidden parameter called "command" in user-specific URLs – e.g., ...

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Thursday placed a now-patched security flaw impacting the popular jQuery JavaScript library to its Known Exploited Vulnerabilities ( KEV ) catalog, based on evidence of active exploitation. The medium-severity vulnerability is CVE-2020-11023 (CVSS score: 6.1/6.9), a nearly five-year-old cross-site scripting (XSS) bug that could be exploited to achieve arbitrary code execution. "Passing HTML containing <option> elements from untrusted sources - even after sanitizing them - to one of jQuery's DOM manipulation methods (i.e. .html(), .append(), and others) may execute untrusted code," according to a GitHub advisory released for the flaw. The problem was addressed in jQuery version 3.5.0 released in April 2020. A workaround for CVE-2020-11023 involves using DOMPurify with the SAFE_FOR_JQUERY flag set to sanitize the HTML string before passing it to a jQuery method. As is typically the case, t...

Cybersecurity researchers are warning of a new stealthy credit card skimmer campaign that targets WordPress e-commerce checkout pages by inserting malicious JavaScript code into a database table associated with the content management system (CMS). "This credit card skimmer malware targeting WordPress websites silently injects malicious JavaScript into database entries to steal sensitive payment details," Sucuri researcher Puja Srivastava said in a new analysis. "The malware activates specifically on checkout pages, either by hijacking existing payment fields or injecting a fake credit card form." The GoDaddy-owned website security company said it discovered the malware embedded into the WordPress wp_options table with the option "widget_block," thus allowing it to avoid detection by scanning tools and persist on compromised sites without attracting attention. In doing so, the idea is to insert the malicious JavaScript into an HTML block widget thr...

Threat hunters have disclosed a new "widespread timing-based vulnerability class" that leverages a double-click sequence to facilitate clickjacking attacks and account takeovers in almost all major websites. The technique has been codenamed DoubleClickjacking by security researcher Paulos Yibelo. "Instead of relying on a single click, it takes advantage of a double-click sequence," Yibelo said . "While it might sound like a small change, it opens the door to new UI manipulation attacks that bypass all known clickjacking protections, including the X-Frame-Options header or a SameSite: Lax/Strict cookie." Clickjacking , also called UI redressing, refers to an attack technique in which users are tricked into clicking on a seemingly innocuous web page element (e.g., a button), leading to the deployment of malware or exfiltration of sensitive data. DoubleClickjacking is a variation of this theme that exploits the gap between the start of a click and the...

North Korean threat actors behind the ongoing Contagious Interview campaign have been observed dropping a new JavaScript malware called OtterCookie . Contagious Interview (aka DeceptiveDevelopment ) refers to a persistent attack campaign that employs social engineering lures, with the hacking crew often posing as recruiters to trick individuals looking for potential job opportunities into downloading malware under the guise of an interview process. This involves distributing malware-laced videoconferencing apps or npm packages either hosted on GitHub or the official package registry, paving the way for the deployment of malware such as BeaverTail and InvisibleFerret. Palo Alto Networks Unit 42, which first exposed the activity in November 2023, is tracking the cluster under the moniker CL-STA-0240. It's also referred to as Famous Chollima and Tenacious Pungsan. In September 2024, Singaporean cybersecurity company Group-IB documented the first major revision to the attack c...

Cybersecurity researchers have found that it's possible to use large language models (LLMs) to generate new variants of malicious JavaScript code at scale in a manner that can better evade detection. "Although LLMs struggle to create malware from scratch, criminals can easily use them to rewrite or obfuscate existing malware, making it harder to detect," Palo Alto Networks Unit 42 researchers said in a new analysis. "Criminals can prompt LLMs to perform transformations that are much more natural-looking, which makes detecting this malware more challenging." With enough transformations over time, the approach could have the advantage of degrading the performance of malware classification systems, tricking them into believing that a piece of nefarious code is actually benign. While LLM providers have increasingly enforced security guardrails to prevent them from going off the rails and producing unintended output, bad actors have advertised tools like WormGPT...

Threat actors have been observed uploading malicious typosquats of legitimate npm packages such as typescript-eslint and @types/node that have racked up thousands of downloads on the package registry. The counterfeit versions, named @typescript_eslinter/eslint and types-node , are engineered to download a trojan and retrieve second-stage payloads, respectively. "While typosquatting attacks are hardly new, the effort spent by nefarious actors on these two libraries to pass them off as legitimate is noteworthy," Sonatype's Ax Sharma said in an analysis published Wednesday. "Furthermore, the high download counts for packages like "types-node" are signs that point to both some developers possibly falling for these typosquats, and threat actors artificially inflating these counts to boost the trustworthiness of their malicious components." The npm listing for @typescript_eslinter/eslint, Sonatype's analysis revealed, points to a phony GitHub repo...

A new phishing campaign has been observed employing tax-themed lures to deliver a stealthy backdoor payload as part of attacks targeting Pakistan. Cybersecurity company Securonix, which is tracking the activity under the name FLUX#CONSOLE , said it likely starts with a phishing email link or attachment, although it said it couldn't obtain the original email used to launch the attack. "One of the more notable aspects of the campaign is how the threat actors leverage MSC (Microsoft Common Console Document) files to deploy a dual-purpose loader and dropper to deliver further malicious payloads," security researchers Den Iuzvyk and Tim Peck said . It's worth noting that the abuse of specially crafted management saved console (MSC) files to execute malicious code has been codenamed GrimResource by Elastic Security Labs. The starting point is a file with double extensions (.pdf.msc) that masquerades as a PDF file (if the setting to display file extensions is disabled)...

Cybersecurity researchers are alerting to a software supply chain attack targeting the popular @solana/web3.js npm library that involved pushing two malicious versions capable of harvesting users' private keys with an aim to drain their cryptocurrency wallets. The attack has been detected in versions 1.95.6 and 1.95.7. Both these versions are no longer available for download from the npm registry. The package is widely used, attracting over 400,000 weekly downloads. "These compromised versions contain injected malicious code that is designed to steal private keys from unsuspecting developers and users, potentially enabling attackers to drain cryptocurrency wallets," Socket said in a report. @solana/web3.js is an npm package that can be used to interact with the Solana JavaScript software development kit (SDK) for building Node.js and web apps. According to Datadog security researcher Christophe Tafani-Dereeper , "the backdoor inserted in v1.95.7 adds an ...

A newly discovered malware campaign has been found to target private users, retailers, and service businesses mainly located in Russia to deliver NetSupport RAT and BurnsRAT. The campaign, dubbed Horns&Hooves by Kaspersky, has hit more than 1,000 victims since it began around March 2023. The end goal of these attacks is to leverage the access afforded by these trojans to install stealer malware such as Rhadamanthys and Meduza . "Recent months have seen a surge in mailings with lookalike email attachments in the form of a ZIP archive containing JScript scripts," security researcher Artem Ushkov said in a Monday analysis. "The script files [are] disguised as requests and bids from potential customers or partners." The threat actors behind the operations have demonstrated their active development of the JavaScript payload, making significant changes during the course of the campaign. In some instances, the ZIP archive has been found to contain other docum...