CVE-2025-53548

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 68% 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
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Clerk helps developers build user management. Applications that use the verifyWebhook() helper to verify incoming Clerk webhooks are susceptible to accepting improperly signed webhook events. The issue was resolved in @clerk/backend 2.4.0.

CVSS v3
7.5
EG Score
7.5(medium)
EPSS
4.8%
KEV
Not listed

Published

July 9, 2025

Last Modified

April 15, 2026

References (1)

Affected Packages

(9 across 1 ecosystem)
npm(9)
PackageVulnerable rangeFixed inDependents
@clerk/astro—2.10.2—
@clerk/backend—2.4.0—
@clerk/express—1.7.4—
@clerk/fastify—2.4.4—
@clerk/nextjs—6.23.3—
@clerk/nuxt—1.7.5—
@clerk/react-router—1.6.4—
@clerk/remix—4.8.5—
@clerk/tanstack-react-start—0.18.3—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 41× 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 101 total refreshes for this CVE.

  1. 2026-07-11 08:27 UTCEPSS rescore
  2. 2026-07-11 08:27 UTCEPSS rescore
  3. 2026-07-10 09:52 UTCOSV refresh
  4. 2026-07-09 19:09 UTCEPSS rescore
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  24. 2026-06-23 21:32 UTCEPSS rescore
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  1. 2026-06-21 19:43 UTCOSV refresh
  2. 2026-06-21 14:56 UTCEPSS rescore
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  6. 2026-06-19 19:25 UTCEPSS rescore
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  8. 2026-06-18 17:52 UTCEPSS rescore
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  25. 2026-06-07 15:24 UTCEPSS rescore
  26. 2026-06-07 15:24 UTCEPSS rescore
  27. 2026-06-06 13:47 UTCEPSS rescore
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  29. 2026-06-05 22:46 UTCEPSS rescore
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  31. 2026-06-05 06:10 UTCEPSS rescore
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  35. 2026-06-03 00:40 UTCOSV refresh
  36. 2026-06-02 20:12 UTCEPSS rescore
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  40. 2026-05-31 22:30 UTCEPSS rescore
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  42. 2026-05-31 00:16 UTCEPSS rescore
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  44. 2026-05-29 13:44 UTCEPSS rescore
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  49. 2026-05-27 13:40 UTCEPSS rescore
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  59. 2026-05-24 16:57 UTCEPSS rescore
  60. 2026-05-23 00:09 UTCEG score recompute
  61. 2026-05-22 21:16 UTCEPSS rescore
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  63. 2026-05-22 21:16 UTCEPSS rescore
  64. 2026-05-21 22:43 UTCEPSS rescore
  65. 2026-05-21 11:28 UTCEG score recompute
  66. 2026-05-20 22:37 UTCEPSS rescore
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  74. 2026-05-20 11:21 UTCEPSS rescore
  75. 2026-05-20 04:03 UTCOSV refresh

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Frequently asked(5)

What is CVE-2025-53548?
CVE-2025-53548 is a high vulnerability published on July 9, 2025. Clerk helps developers build user management. Applications that use the verifyWebhook() helper to verify incoming Clerk webhooks are susceptible to accepting improperly signed webhook events. The issue was resolved in @clerk/backend 2.4.0.
When was CVE-2025-53548 disclosed?
CVE-2025-53548 was first published in the National Vulnerability Database on July 9, 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-2025-53548 actively exploited?
CVE-2025-53548 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 4.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2025-53548?
CVE-2025-53548 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2025-53548?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-53548, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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