CVE-2025-31137

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 1.2%, top 36% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.2%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

React Router is a multi-strategy router for React bridging the gap from React 18 to React 19. There is a vulnerability in Remix/React Router that affects all Remix 2 and React Router 7 consumers using the Express adapter. Basically, this vulnerability allows anyone to spoof the URL used in an incoming Request by putting a URL pathname in the port section of a URL that is part of a Host or X-Forwarded-Host header sent to a Remix/React Router request handler. This issue has been patched and released in Remix 2.16.3 and React Router 7.4.1.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
34
EG Risk 34/100

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
Severity75% × 45%
Exploitation1% × 40%
Automatability0% × 15%
EPSS PROB
1.2%
EPSS %ILE
66th
KEV
Not listed

Published

April 1, 2025

Last Modified

April 15, 2026

References (1)

Affected Packages

(2 across 1 ecosystem)
npm(2)
PackageVulnerable rangeFix by version rangeDependents
@react-router/express—
  • 7.0.0 up to 7.4.1: fixed in 7.4.1
—
@remix-run/express—
  • 2.11.1 up to 2.16.3: fixed in 2.16.3
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 28× 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 195 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2025-31137?
CVE-2025-31137 is a high vulnerability published on April 1, 2025. React Router is a multi-strategy router for React bridging the gap from React 18 to React 19. There is a vulnerability in Remix/React Router that affects all Remix 2 and React Router 7 consumers using the Express adapter. Basically, this vulnerability allows anyone to spoof the URL used in an…
When was CVE-2025-31137 disclosed?
CVE-2025-31137 was first published on April 1, 2025, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-31137 actively exploited?
CVE-2025-31137 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.2% probability of exploitation in the next 30 days (66th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2025-31137?
CVE-2025-31137 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2025-31137?
A fix for CVE-2025-31137 is available: update to the fixed version the vendor names in its advisory.

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