cve.bz

CVE-2025-53548

7.5 highEPSS 0.2%

High (7.5). EPSS 0.2% chance of exploitation in the next 30 days. Fixed in @clerk/backend 2.4.0.

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.

Severity

CVSS 3.1

7.5 high
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS
0.2% chance of exploitation in the next 30 days; higher than 6% of CVEs (scores of 2026-10-31)
CWE
CWE-345
Published
Modified
Record from
the NVD, synced

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-9mp4-77wg-rwx9npm@clerk/backend>=2.0.0 <2.4.02.4.0
GHSA-9mp4-77wg-rwx9npm@clerk/astro>=2.9.0 <2.10.22.10.2
GHSA-9mp4-77wg-rwx9npm@clerk/express>=1.6.0 <1.7.41.7.4
GHSA-9mp4-77wg-rwx9npm@clerk/fastify>=2.3.0 <2.4.42.4.4
GHSA-9mp4-77wg-rwx9npm@clerk/nextjs>=6.2.10 <6.23.36.23.3
GHSA-9mp4-77wg-rwx9npm@clerk/nuxt>=1.7.0 <1.7.51.7.5
GHSA-9mp4-77wg-rwx9npm@clerk/react-router>=1.5.0 <1.6.41.6.4
GHSA-9mp4-77wg-rwx9npm@clerk/remix>=4.8.0 <4.8.54.8.5
GHSA-9mp4-77wg-rwx9npm@clerk/tanstack-react-start>=0.16.0 <0.18.30.18.3

References

Check your stackJSON