CVE-2025-55182

CRITICALNVD 10.010.0—
EchelonGraph scoreHIGH confidence

Score elevated to 10.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2025-12-05), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 10.0 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, nvd
Exploited in the wild
10.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 100%CVSS: 10.0Exploit: cisa kev · ssvc active · kev ransomware · Metasploit · epss top5pct · epss high · public exploitExposed services: Not assessed

A fix is available — apply it.

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 v3
10.0
EG Score
10.0CRITICALhigh confidence
EG Risk
100
EG Risk 100/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity100% × 45%
Exploitation100% × 40%
Automatability100% × 15%
CISA SSVC: Attend at low mission impact; Act at medium or high.
Action: A fix is available. Apply it sooner than your standard update timelines at low mission impact and as soon as possible at medium or high.
EPSS PROB
100%
EPSS %ILE
99th
KEV
⚠ Exploited

CISA SSVCAttend at low mission impact; Act at medium or high.

A fix is available. Apply it sooner than your standard update timelines at low mission impact and as soon as possible at medium or high.

Exploitation active (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

December 3, 2025

Last Modified

October 8, 2026

Advisory Details (6)

Auto-updated Oct 8, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
cisa🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-55182
generic

China-nexus cyber threat groups rapidly exploit React2Shell vulnerability (CVE-2025-55182) | AWS Security Blog

https://aws.amazon.com/blogs/security/china-nexus-cyber-threat-groups-rapidly-exploit-react2shell-vulnerability-cve-2025-55182/
generic🔴 Active Exploitation

RCE Vulnerability in React and Next.js | Hacker News

https://news.ycombinator.com/item?id=46136026
generic

oss-security - CVE-2025-55182: RCE in React Server Components

http://www.openwall.com/lists/oss-security/2025/12/03/4
generic

CVE-2025-55182

https://www.facebook.com/security/advisories/cve-2025-55182
generic

Critical Security Vulnerability in React Server Components – React

https://react.dev/blog/2025/12/03/critical-security-vulnerability-in-react-server-components

Vendor Advisories for CVE-2025-55182(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(3 across 1 ecosystem)
npm(3)
PackageVulnerable rangeFix by version rangeDependents
react-server-dom-parcel19.2.0
  • 19.0.0 up to 19.0.1: fixed in 19.0.1
  • 19.1.0 up to 19.1.2: fixed in 19.1.2
  • 19.2.0 up to 19.2.1: fixed in 19.2.1
—
react-server-dom-turbopack19.2.0
  • 19.0.0 up to 19.0.1: fixed in 19.0.1
  • 19.1.0 up to 19.1.2: fixed in 19.1.2
  • 19.2.0 up to 19.2.1: fixed in 19.2.1
—
react-server-dom-webpack19.2.0
  • 19.0.0 up to 19.0.1: fixed in 19.0.1
  • 19.1.0 up to 19.1.2: fixed in 19.1.2
  • 19.2.0 up to 19.2.1: fixed in 19.2.1
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 0× in last 7d / 20× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 113 total refreshes for this CVE.

  1. 2026-09-28 21:55 UTCEG score recompute
  2. 2026-09-27 21:51 UTCCISA KEV update
  3. 2026-09-25 19:35 UTCCISA KEV update
  4. 2026-09-25 14:55 UTCCISA KEV update
  5. 2026-09-24 19:31 UTCCISA KEV update
  6. 2026-09-24 17:21 UTCEG score recompute
  7. 2026-09-24 14:02 UTCEPSS rescore
  8. 2026-09-22 19:36 UTCCISA KEV update
  9. 2026-09-22 15:05 UTCEG score recompute
  10. 2026-09-21 22:21 UTCEG score recompute
  11. 2026-09-21 21:06 UTCEPSS rescore
  12. 2026-09-21 19:09 UTCCISA KEV update
  13. 2026-09-20 21:14 UTCEG score recompute
  14. 2026-09-20 20:15 UTCEPSS rescore
  15. 2026-09-20 20:15 UTCEPSS rescore
  16. 2026-09-18 19:20 UTCCISA KEV update
  17. 2026-09-18 14:15 UTCCISA KEV update
  18. 2026-09-16 14:10 UTCCISA KEV update
  19. 2026-09-14 19:24 UTCCISA KEV update
  20. 2026-09-11 18:49 UTCCISA KEV update
  21. 2026-09-10 19:28 UTCCISA KEV update
  22. 2026-09-09 19:08 UTCCISA KEV update
  23. 2026-09-08 18:54 UTCCISA KEV update
  24. 2026-09-05 16:49 UTCEG score recompute
  25. 2026-09-05 15:28 UTCEPSS rescore
Show 75 more
  1. 2026-09-04 17:38 UTCCISA KEV update
  2. 2026-09-02 17:33 UTCCISA KEV update
  3. 2026-08-31 14:19 UTCCISA KEV update
  4. 2026-08-30 22:18 UTCEG score recompute
  5. 2026-08-30 19:16 UTCEPSS rescore
  6. 2026-08-29 00:10 UTCEG score recompute
  7. 2026-08-28 21:40 UTCEPSS rescore
  8. 2026-08-27 17:22 UTCCISA KEV update
  9. 2026-08-26 17:41 UTCCISA KEV update
  10. 2026-08-24 18:52 UTCCISA KEV update
  11. 2026-08-24 15:08 UTCEG score recompute
  12. 2026-08-24 14:16 UTCEPSS rescore
  13. 2026-08-21 16:49 UTCCISA KEV update
  14. 2026-08-20 17:06 UTCCISA KEV update
  15. 2026-08-19 17:33 UTCCISA KEV update
  16. 2026-08-18 16:58 UTCCISA KEV update
  17. 2026-08-17 13:56 UTCCISA KEV update
  18. 2026-08-12 14:18 UTCEG score recompute
  19. 2026-08-12 13:50 UTCEPSS rescore
  20. 2026-08-12 13:50 UTCEPSS rescore
  21. 2026-08-11 19:32 UTCCISA KEV update
  22. 2026-08-07 17:09 UTCCISA KEV update
  23. 2026-08-05 17:25 UTCCISA KEV update
  24. 2026-08-04 17:02 UTCCISA KEV update
  25. 2026-08-03 19:22 UTCCISA KEV update
  26. 2026-08-01 04:45 UTCEG score recompute
  27. 2026-08-01 04:15 UTCEPSS rescore
  28. 2026-07-30 10:46 UTCEG score recompute
  29. 2026-07-29 19:27 UTCCISA KEV update
  30. 2026-07-27 19:24 UTCCISA KEV update
  31. 2026-07-27 17:17 UTCCISA KEV update
  32. 2026-07-26 14:19 UTCEG score recompute
  33. 2026-07-26 01:41 UTCEG score recompute
  34. 2026-07-23 14:18 UTCEPSS rescore
  35. 2026-07-23 02:59 UTCEG score recompute
  36. 2026-07-22 22:24 UTCEG score recompute
  37. 2026-07-22 19:40 UTCCISA KEV update
  38. 2026-07-21 14:37 UTCCISA KEV update
  39. 2026-07-17 08:20 UTCEG score recompute
  40. 2026-07-16 17:04 UTCCISA KEV update
  41. 2026-07-15 16:49 UTCCISA KEV update
  42. 2026-07-15 15:04 UTCCISA KEV update
  43. 2026-07-14 18:05 UTCCISA KEV update
  44. 2026-07-13 17:07 UTCCISA KEV update
  45. 2026-07-10 17:52 UTCCISA KEV update
  46. 2026-07-07 19:01 UTCCISA KEV update
  47. 2026-07-07 17:16 UTCCISA KEV update
  48. 2026-07-06 16:27 UTCEPSS rescore
  49. 2026-07-06 16:27 UTCEPSS rescore
  50. 2026-07-01 19:16 UTCCISA KEV update
  51. 2026-06-29 19:12 UTCCISA KEV update
  52. 2026-06-25 19:15 UTCCISA KEV update
  53. 2026-06-23 17:44 UTCCISA KEV update
  54. 2026-06-18 16:13 UTCCISA KEV update
  55. 2026-06-16 19:33 UTCCISA KEV update
  56. 2026-06-15 19:33 UTCCISA KEV update
  57. 2026-06-15 17:48 UTCEPSS rescore
  58. 2026-06-14 23:17 UTCEPSS rescore
  59. 2026-06-12 23:11 UTCEPSS rescore
  60. 2026-06-12 17:35 UTCCISA KEV update
  61. 2026-06-11 19:10 UTCCISA KEV update
  62. 2026-06-11 14:00 UTCEPSS rescore
  63. 2026-06-11 14:00 UTCEPSS rescore
  64. 2026-06-10 22:18 UTCEPSS rescore
  65. 2026-06-10 22:18 UTCEPSS rescore
  66. 2026-06-09 18:42 UTCCISA KEV update
  67. 2026-06-09 17:12 UTCCISA KEV update
  68. 2026-06-08 19:16 UTCCISA KEV update
  69. 2026-06-08 17:26 UTCCISA KEV update
  70. 2026-06-08 14:16 UTCEPSS rescore
  71. 2026-06-08 14:16 UTCEPSS rescore
  72. 2026-06-07 15:24 UTCEPSS rescore
  73. 2026-06-07 15:24 UTCEPSS rescore
  74. 2026-06-06 13:47 UTCEPSS rescore
  75. 2026-06-06 13:47 UTCEPSS rescore

Publicly available exploits

(13 references, 10 shown)

Public exploit code is referenced for this CVE (1 Metasploit module, 1 Exploit-DB entry, 10 GitHub PoCs, 1 Nuclei detection template). Defenders should treat patch urgency accordingly.

  • Metasploitexploit/multi/http/react2shell_unauth_rce_cve_2025_55182✓ verified

    Unauthenticated RCE in React Server Components (React2Shell)

    Open source ↗
  • Exploit-DBEDB-52506

    React Server 19.2.0 - Remote Code Execution

    Open source ↗
  • GitHub PoCalptexans/RSC-Detect-CVE-2025-55182

    RSC Detect CVE 2025 55182

    Open source ↗
  • GitHub PoCemredavut/CVE-2025-55182

    RSC/Next.js RCE Vulnerability Detector & PoC Chrome Extension – CVE-2025-55182 & CVE-2025-66478

    Open source ↗
  • GitHub PoCynsmroztas/NextRce

    React Shell & Next.js RSC Exploit Tool (CVE-2025-55182)

    Open source ↗
  • GitHub PoCzack0x01/CVE-2025-55182-advanced-scanner-
    Open source ↗
  • GitHub PoClachlan2k/React2Shell-CVE-2025-55182-original-poc

    Original Proof-of-Concepts for React2Shell CVE-2025-55182

    Open source ↗
  • GitHub PoCmrknow001/RSC_Detector

    Supports RSC fingerprinting and exploitation of the React component vulnerability CVE-2025-55182.

    Open source ↗
  • GitHub PoCpyroxenites/Nextjs_RCE_Exploit_Tool

    Exploit for CVE-2025-55182 & CVE-2025-66478

    Open source ↗
  • GitHub PoCassetnote/react2shell-scanner

    High Fidelity Detection Mechanism for RSC/Next.js RCE (CVE-2025-55182 & CVE-2025-66478)

    Open source ↗

Related CVEs(same product + same CWE)

Frequently asked(6)

What is CVE-2025-55182?
CVE-2025-55182 is a critical vulnerability published on December 3, 2025. 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…
When was CVE-2025-55182 disclosed?
CVE-2025-55182 was first published on December 3, 2025, with the most recent update on October 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-55182 actively exploited?
Yes. CISA added CVE-2025-55182 to the Known Exploited Vulnerabilities catalog on December 5, 2025, affecting Meta React Server Components. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate attention. A fix is available. Apply it.
What is the CVSS score of CVE-2025-55182?
CVE-2025-55182 has a CVSS v3 base score of 10.0 (NVD).
Which products are affected by CVE-2025-55182?
CVE-2025-55182 affects Meta React Server Components. The affected packages EchelonGraph has on record, with version ranges, are listed in the Affected Packages section of this page.
How do I remediate CVE-2025-55182?
A fix for CVE-2025-55182 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2025-55182 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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