All news with #rce tag

Chinese Threat Actors Rapidly Exploit React2Shell Flaw

⚠️ Within hours of public disclosure, two China-linked groups began exploiting the newly disclosed CVE-2025-55182 (React2Shell) remote code execution flaw in React Server Components. AWS telemetry from MadPot honeypots attributes activity to Earth Lamia and Jackpot Panda, showing attempts to run discovery commands such as "whoami", write files like "/tmp/pwned.txt", and read sensitive files such as "/etc/passwd". Vendors addressed the bug in React 19.0.1, 19.1.2, and 19.2.1, but attackers are concurrently scanning for other N-day flaws.

Cloudflare Outage Caused by Emergency React2Shell Patch

🔧 Cloudflare says an emergency patch to mitigate the critical React2Shell vulnerability (CVE-2025-55182) introduced a change to its Web Application Firewall request parsing that briefly rendered the network unavailable and caused global "500 Internal Server Error" responses. The update targeted active remote code execution attempts against React Server Components and dependent frameworks. Cloudflare emphasized the incident was not an attack and that the change was deployed to protect customers while the industry addresses the flaw.

CISA Adds CVE-2025-55182 to Known Exploited Vulnerabilities

⚠️ CISA added CVE-2025-55182, a remote code execution vulnerability in Meta React Server Components, to the Known Exploited Vulnerabilities (KEV) Catalog after observing active exploitation. This type of RCE is a common and serious attack vector that poses significant risk to federal networks and other organizations. Under BOD 22-01, Federal Civilian Executive Branch agencies must remediate KEV entries by their due dates. CISA strongly urges all organizations to prioritize timely remediation and vulnerability management to reduce exposure.

React2Shell critical flaw exploited by China-linked groups

⚠️React2Shell is a max-severity insecure deserialization vulnerability in the React Server Components 'Flight' protocol that allows unauthenticated remote execution of JavaScript on affected servers. Within hours of disclosure, AWS telemetry observed exploitation attempts by China-linked groups including Earth Lamia and Jackpot Panda, and multiple proof-of-concept exploits have been published. React and Next.js have released patches; administrators should apply updates, scan for vulnerable deployments, and monitor for known exploitation indicators.

Cloudflare outage after WAF update to block React exploit

🛡️ Cloudflare briefly disrupted service after a Web Application Firewall update intended to mitigate a vulnerability in React Server Components (CVE-2025-55182) caused its request parser to fail. The incident began at 09:09 UTC and a corrective change was deployed within ten minutes, but monitoring sites and customers reported widespread errors during the outage. Downdetector logged spikes for enterprise and consumer services including Shopify, Zoom, Claude AI, and AWS. Cloudflare said the change was a protective measure for unpatched customers and confirmed the disruption was not an attack.

China-nexus Rapid Exploitation of React2Shell CVE-2025-55182

🛡️ Amazon observed multiple China state-nexus groups rapidly exploiting CVE-2025-55182 (React2Shell), a critical unsafe deserialization flaw in React Server Components with a CVSS score of 10.0 that affects React 19.x and Next.js 15.x/16.x when using App Router. AWS deployed Sonaris active defense, AWS WAF managed rules (AWSManagedRulesKnownBadInputsRuleSet v1.24+) and MadPot honeypots to detect and block attempts, but these protections are not substitutes for patching. Customers running self-managed React/Next.js applications must update immediately, deploy interim WAF rules, and review logs for indicators such as POST requests with next-action or rsc-action-id headers.

Critical RCE in React and Next.js Flight Protocol Disclosed

🚨 Researchers disclosed critical remote code execution vulnerabilities in the Flight protocol for React Server Components (CVE-2025-55182 and CVE-2025-66478). The flaw permits unauthenticated attackers to achieve deterministic RCE via insecure deserialization of malformed HTTP payloads, with near-100% reliability against default deployments. Vendors have issued patched releases; administrators should apply upgrades immediately. Palo Alto Networks Unit 42 published detection guidance and hunting queries to help identify exploitation and post-exploitation activity.

Generative AI's Dual Role in Cybersecurity, Evolving

🛡️ Generative AI is rapidly reshaping cybersecurity by amplifying both attackers' and defenders' capabilities. Adversaries leverage models for coding assistance, phishing and social engineering, anti-analysis techniques (including prompts hidden in DNS) and vulnerability discovery, with AI-assisted elements beginning to appear in malware while still needing significant human oversight. Defenders use GenAI to triage threat data, speed incident response, detect code flaws, and augment analysts through MCP-style integrations. As models shrink and access widens, both risk and defensive opportunity are likely to grow.

WARP PANDA: Sophisticated China-Nexus Cloud Threats

🔍 CrowdStrike identified a China-nexus adversary, WARP PANDA, conducting covert intrusions against VMware vCenter and cloud infrastructure throughout 2025, deploying novel Golang implants and the backdoor BRICKSTORM. Operations emphasized stealth—log clearing, timestomping, unregistered VMs, and tunnelling via vCenter/ESXi/guest VMs—enabling long-term persistence and data staging from live VM snapshots. WARP PANDA also exfiltrated Microsoft 365 and SharePoint content, registered MFA devices, and abused cloud services for C2, prompting recommendations for tighter ESXi/vCenter controls and robust EDR on guests.

Urgent: Patch React 19 and Next.js to Mitigate RCE

⚠️ Developers must immediately upgrade React 19 and affected frameworks such as Next.js after researchers at Wiz disclosed a critical deserialization vulnerability in the React Server Components (RSC) Flight protocol that can enable remote code execution. The flaw exists in default configurations and impacts React 19.0.0, 19.1.0, 19.1.1 and 19.2.0, while Next.js 15.x and 16.x App Router deployments received a related CVE. Upgrade to the latest vendor-recommended releases now and follow the React blog's guidance.

RCE Flaw in OpenAI's Codex CLI Elevates Dev Risks Globally

⚠️Researchers from CheckPoint disclosed a critical remote code execution vulnerability in OpenAI's Codex CLI that allowed project-local .env files to redirect the CODEX_HOME environment variable and load attacker-controlled MCP servers. By adding a malicious mcp_servers entry in a repo-local .codex/config.toml, an attacker with commit or PR access could cause Codex to execute commands silently whenever a developer runs the tool. OpenAI addressed the issue in Codex CLI v0.23.0 by blocking project-local redirection of CODEX_HOME, but the flaw demonstrates how automated LLM-powered developer tools can expand the attack surface and enable persistent supply-chain backdoors.

Critical Privilege-Escalation Flaw in King Addons for WP

⚠️ A critical privilege-escalation vulnerability (CVE-2025-8489) in the King Addons for Elementor plugin is being actively exploited to create administrative accounts during registration. Attacks began on October 31, a day after public disclosure, and Wordfence reports blocking more than 48,400 exploit attempts. Site owners should upgrade to King Addons 51.1.35 immediately and check logs for suspicious IPs and unexpected admin accounts.

Critical RSC Deserialization Flaw in React and Next.js

🚨 A maximum-severity remote code execution vulnerability in React Server Components (CVE-2025-55182, CVSS 10.0) allows unauthenticated attackers to execute arbitrary JavaScript by sending crafted payloads to Server Function endpoints. Affected npm packages include react-server-dom-webpack, react-server-dom-parcel, and react-server-dom-turbopack in specific 19.x releases; fixes are available in 19.0.1, 19.1.2, and 19.2.1. The issue also impacts Next.js (CVE-2025-66478, CVSS 10.0) across multiple releases and has been patched in a series of 15.x and 16.x updates. Security firm Wiz reports roughly 39% of cloud environments host vulnerable instances; apply patches immediately.

Microsoft Quietly Patches Long-Exploited Windows LNK Bug

🔒 Microsoft has quietly fixed CVE-2025-9491, a Windows Shortcut (.LNK) UI misinterpretation flaw that enabled remote code execution and has been abused since 2017 by multiple state-affiliated and criminal groups. The change, deployed in November 2025, forces the Properties dialog to display the full Target command string regardless of length, removing the truncation that hid malicious arguments. Vendors including 0patch and ACROS Security noted alternative mitigations — a UI change by Microsoft and a warning-based micropatch — that together reduce user exposure.

Intellexa Continues Exploitation of Zero-Day Bugs Worldwide

🔍 Google Threat Intelligence Group (GTIG) analysis shows that Intellexa, vendor of the Predator spyware, continues to develop and deploy zero‑day exploits against mobile browsers and operating systems despite sanctions. GTIG attributes 15 unique zero‑days to Intellexa out of roughly 70 discovered since 2021, spanning RCE, sandbox escape, and LPE flaws on iOS, Android, and Chrome. The company uses modular exploit frameworks, acquires exploit chain steps from third parties, delivers payloads via one‑time messaging links and malvertising, and embeds anti‑analysis watcher modules to abort operations on detection.

Malicious Chrome and Edge Extensions Abused by ShadyPanda

🛡️Researchers at Koi Security uncovered a multi-year campaign by an actor dubbed ShadyPanda that abused trusted Chrome and Edge extensions to harvest browsing data, manipulate search results and traffic, and install a backdoor. The group amassed roughly 4.3 million infected browser instances by publishing legitimate-looking add-ons and later pushing malicious updates. Although many extensions have been removed from stores, infected browsers remain at risk because extensions auto-update and marketplaces generally review only at submission.

Picklescan Flaws Enable Malicious PyTorch Model Execution

⚠️ Picklescan, a Python pickle scanner, has three critical flaws that can be abused to execute arbitrary code when loading untrusted PyTorch models. Discovered by JFrog researchers, the issues — a file-extension bypass (CVE-2025-10155), a ZIP CRC bypass (CVE-2025-10156) and an unsafe-globals bypass (CVE-2025-10157) — let attackers present malicious models as safe. The vulnerabilities were responsibly disclosed on June 29, 2025 and fixed in Picklescan 0.0.31 on September 9; users should upgrade and review model-loading practices and downstream automation that accepts third-party models.

Cloudflare WAF Blocks Critical React Server Components RCE

🛡️ Cloudflare has deployed new WAF protections to mitigate a high‑severity RCE in React Server Components (CVE-2025-55182). All customers whose React traffic is proxied through the Cloudflare WAF are automatically protected — the rules are included in both the Free Managed Ruleset and the standard Managed Ruleset and default to Block. Rule IDs: Managed Ruleset 33aa8a8a948b48b28d40450c5fb92fba and Free Ruleset 2b5d06e34a814a889bee9a0699702280; Cloudflare Workers are immune. Customers on paid plans should verify Managed Rules are enabled and update to React 19.2.1 and the recommended Next.js releases (16.0.7, 15.5.7, 15.4.8).

Mirion Medical EC2 NMIS BioDose: High-Risk Vulnerabilities

⚠️ Mirion Medical's EC2 Software NMIS BioDose versions prior to 23.0 contain multiple high-severity vulnerabilities (CVSS v4: 8.7) that are remotely exploitable and can enable code execution, data disclosure, and unauthorized access. The issues include incorrect permission assignment, client-side authentication, and hard-coded credentials affecting installed executables, the embedded SQL Server, and database accounts. Mirion recommends updating to v23.0 or later; CISA advises isolating control networks, minimizing exposure, and using secure remote access while performing impact analysis.

Google Issues December Patch for 107 Android Flaws

🔒 Google released its December 2025 Android security update addressing 107 vulnerabilities across Framework, System, Kernel and components from Arm, Imagination Technologies, MediaTek, Qualcomm, and Unison. Two high-severity Framework defects — CVE-2025-48633 (information disclosure) and CVE-2025-48572 (privilege elevation) — are reported as exploited in the wild. A separate critical Framework issue, CVE-2025-48631, could enable remote DoS without added privileges. Google published two patch levels, 2025-12-01 and 2025-12-05, and users should update promptly when vendors release device-specific builds.