Trend Micro researchers have previously published a blog on what organizations need to know about the actively exploited CVE-2025-55182, which is a critical (CVSS 10.0) pre-authentication remote code execution vulnerability affecting React Server Components (RSC) used in React.js, Next.js, and related frameworks.
RSC is a modern architecture where UI components run on the server instead of the browser, reducing JavaScript sent to clients. RSC communicate between client and server using a serialization protocol called “React Flight.” This protocol enables streaming of complex data structures that mirror the React component tree, allowing UIs to render progressively while awaiting backend responses. The sum of which can be called the RSC payload. Think of it as an RPC-over-HTTP mechanism where clients send “chunks” of serialized data to Server Functions.
Read more…
Source: Trend Micro
Sign up for the Cyber Security Review Newsletter
The latest cyber security news and insights delivered right to your inbox
Related:
- Cisco aids Ukraine in cyber defense with modified switches to counter Russian attacks
November 23, 2023
Cisco has proactively shipped modified switches to Ukrenergo, the state-owned electricity grid operator in Ukraine, to bolster its defenses against Russian cyberattacks targeting energy infrastructure. These attacks have included the use of GPS-jamming tactics, which disrupt the high-voltage energy subsystems crucial for power distribution and damage assessment. The reliance of Ukraine’s substations on GPS for time ...
- How to stop fake System notifications on macOS
November 21, 2023
Scammers are abusing an Apple feature that allows websites to create push notifications that look like they’re coming from macOS, or apps. The notifications try to scare users into clicking a link with fake virus alerts or messages saying their account has been hacked. Years ago Malwarebytes Labs warned our readers about the introduction of browser ...
- SysAid path traversal vulnerability
November 21, 2023
SonicWall Capture Labs Threat Research Team became aware of the SysAid path traversal vulnerability, assessed its impact and developed mitigation measures for the vulnerability. On November 8, 2023, SysAid, an IT service management company, disclosed CVE-2023-47426, which is a zero-day path traversal vulnerability carrying a CVSS 9.8 score and affecting on-premise SysAid servers running version < ...
- #StopRansomware: LockBit 3.0 Ransomware Affiliates Exploit CVE 2023-4966 Citrix Bleed Vulnerability
November 21, 2023
The Cybersecurity and Infrastructure Security Agency (CISA), Federal Bureau of Investigation (FBI), Multi-State Information Sharing & Analysis Center (MS-ISAC), and Australian Signals Directorate’s Australian Cyber Security Center (ASD’s ACSC) are releasing this joint Cybersecurity Advisory (CSA) to disseminate IOCs, TTPs, and detection methods associated with LockBit 3.0 ransomware exploiting CVE-2023-4966, labeled Citrix Bleed, affecting Citrix ...
- Hackers accessed sensitive health data of Welltok patients
November 20, 2023
Hackers accessed the personal data of more than a million people by exploiting a security vulnerability in a file transfer tool used by Welltok, the healthcare platform owned by Virgin Pulse. Welltok, a Denver-based patient engagement company that works with healthcare plans to provide communications to subscribers about their healthcare, confirmed in a data breach notification ...
- Zimbra 0-day used to target international government organizations
November 16, 2023
In June 2023, Google’s Threat Analysis Group (TAG) discovered an in-the-wild 0-day exploit targeting Zimbra Collaboration, an email server many organizations use to host their email. Since discovering the 0-day, now patched as CVE-2023-37580, TAG has observed four different groups exploiting the same bug to steal email data, user credentials, and authentication tokens. Most of this ...