CVE-2025-55182 CISA KEV · Actively exploitedLinked to ransomwareSuited to automated attack · CISA

Deserialization of untrusted data in Meta React Server Dom Webpack

CVSS score

10.0

EPSS probability

%99.8

Risk score

20.0

Published

10 mo ago

Overview Public Exploits (0)Newsroom Vulnerability Timeline

Official patch verified

Etkilenen ürün ve sürüm için yayımlanan güvenlik güncellemesini uygulayın.

Impact on My Inventory

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Vulnerability description

CVE AI research

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DayBreach AI Explanation

Verified against sources

CVE-2025-55182: Pre-authentication Remote Code Execution in React Server Components

Sources read

Source agreement

Tam uyum

Evidence confidence

%63

Short explanation

A critical pre-authentication remote code execution vulnerability exists in React Server Components, allowing unauthenticated attackers to execute arbitrary code via unsafe deserialization of HTTP payloads. The vulnerability is confirmed in CISA's Known Exploited Vulnerabilities Catalog and affects multiple versions of React and Next.js. A patch is available and should be applied immediately to mitigate risk.

Why does it matter?

This vulnerability enables attackers to execute arbitrary code on target systems without requiring login or authentication, making it a high-severity threat for any application using React Server Components. The presence of the vulnerability in widely used frameworks increases its potential impact across the ecosystem.

What should be done?

Update to patched versions of React Server Components and Next.js
Apply vendor advisories from Meta and Vercel
Monitor for signs of exploitation in production environments

Note on uncertainty

The sources give limited detail on some technical conditions. Review the chain of evidence below before deciding how to act.

Chain of evidence and sources5 verified claims

React Server Components 19.0.0, 19.1.0, 19.1.1 ve 19.2.0 sürümlerinde, react-server-dom-parcel, react-server-dom-turbopack ve react-server-dom-webpack paketlerinde bir öncü kimlik doğrulama ile uzak kod çalıştırma istismarı mevcuttur.

S0 · daybreach-canonical

Bu açık, HTTP istek yüklerinin güvenli olmayan deserializasyonuyla Server Function uç noktalarına erişim sağlayarak, kimlik doğrulama olmadan uzak kod çalıştırmasını mümkün kılar.

S0 · daybreach-canonical

Bir yama mevcut ve NVD ve React'in resmi blogu gibi kaynaklarda doğrulanmıştır; üretici bildirimlerinde düzeltme sürümüne dair referanslar mevcuttur.

S0 · daybreach-canonical S2 · nvd

CVE-2025-55182, CISA'nın Bilinen Ele Geçirilen açık Kataloğu'nda yer almakta olup, aktif istismar olduğunu göstermektedir.

S0 · daybreach-canonical

Bu açık, React ve Next.js ile ilişkilidir ve 15.0.0 ile 16.0.7 arasında, dahil olmak üzere canary sürümlerini etkiliyor.

S0 · daybreach-canonical

Show the technical text from the sources

A pre-authentication remote code execution vulnerability exists in React Server Components versions 19.0.0, 19.1.0, 19.1.1, and 19.2.0 including the following packages: react-server-dom-parcel, react-server-dom-turbopack, and react-server-dom-webpack. The vulnerable code unsafely deserializes payloads from HTTP requests to Server Function endpoints.

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

CWE: CWE-502

Explanation produced with the local qwen3:4b-instruct model. Numerical metrics and the KEV, patch and exploit statuses are not determined by AI.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2025-55182 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

ID	VENDOR	PRODUCT	ACTION
1	Meta	react-server-dom-webpack	View
2	Meta	react-server-dom-turbopack	View
3	Meta	react-server-dom-parcel	View
4	facebook	react	View
5	facebook	react	View
6	facebook	react	View
7	facebook	react	View
8	vercel	next.js	View
9	vercel	next.js	View
10	vercel	next.js	View
11	vercel	next.js	View
12	vercel	next.js	View
13	vercel	next.js	View
14	vercel	next.js	View
15	vercel	next.js	View
16	vercel	next.js	View
17	vercel	next.js	View

Total affected vendors: 3|Products: 17

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCORE	VERSION	SEVERITY	VECTOR	SOURCE
10.0	CVSS V3_1	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H	CVE CNA
10.0	CVSS V31	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H	NVD

Patch and Remediation Guide

Solution & Remediation Advisory

Patch verified

3 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

nvd

NVD tarafından Patch olarak etiketlenmiş referans

Open source

nvd

NVD tarafından Patch olarak etiketlenmiş referans

Open source

reference

Yama veya çözüm referansı

Open source

canonical

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Confirm the affected product and version against the source evidence above.

Restrict access to internet-facing services and apply network segmentation.

Apply the official update named in the evidence only to the matching product and version.

Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

This CVE is marked as actively exploited in the CISA KEV catalogue, but no verified, downloadable public PoC or Metasploit module has been found yet. Evidence of active exploitation does not mean that public exploit code exists.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-55182 is associated with the following CWEs:

CWE-502: Deserialization of Untrusted Data

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-55182 weaknesses.

CAPEC-66: SQL Injection CAPEC-126: Path Traversal CAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden

PermissionsGerekmiyor

UserGerekmiyor

Official Sources and Advisories

https://www.facebook.com/security/advisories/cve-2025-55182vendor-advisory https://react.dev/blog/2025/12/03/critical-security-vulnerability-in-react-server-componentsvendor-advisory http://www.openwall.com/lists/oss-security/2025/12/03/4patch https://news.ycombinator.com/item?id=46136026nvd https://aws.amazon.com/blogs/security/china-nexus-cyber-threat-groups-rapidly-exploit-react2shell-vulnerability-cve-2025-55182/nvd https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-55182nvd CISA Known Exploited Vulnerabilities Catalogkev

CVSS Vector Radar Chart

10.0 / 10

Vulnerability Scoring Details

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone required

User InteractionNone required

Confidentiality (Gizlilik)Low

Integrity (Bütünlük)None

Availability (Erişilebilirlik)High

Yama doğrulandı

3 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

Follow the vendor

Weakness Type (CWE & CAPEC)

CWE-502

Similar Vulnerabilities

7.5

CVE-2025-55184

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Deserialization of untrusted data in Meta React Server Dom Webpack

Impact on My Inventory

Vulnerability description

DayBreach AI Explanation

Short explanation

What should be done?

IMPACT: Affected Products and Software

Affected Products

RED HAT CSAF/VEX: Product Impact Check

SCORING: CVSS from Multiple Sources

CVSS Scores

Patch and Remediation Guide

Solution & Remediation Advisory

Public exploit and active exploitation status

Verified exploit intelligence

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

Common Attack Pattern Enumeration and Classification (CAPEC)

Attack Vector and Accessibility

Official Sources and Advisories

CVSS Vector Radar Chart

Vulnerability Scoring Details

Weakness Type (CWE & CAPEC)

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