CVE-2025-53548

HIGH

Clerk Backend < 2.4.0 - Insufficient Verification of Data Authenticity in Webhook Verification

Title source: llm
STIX 2.1

Description

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.

References (1)

Core 1
Core References

Scores

CVSS v3 7.5
EPSS 0.0015
EPSS Percentile 4.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-345
Status published
Products (10)
clerk/astro 2.9.0 - 2.10.2npm
clerk/backend 2.0.0 - 2.4.0npm
clerk/express 1.6.0 - 1.7.4npm
clerk/fastify 2.3.0 - 2.4.4npm
clerk/javascript < 2.4.0
clerk/nextjs 6.2.10 - 6.23.3npm
clerk/nuxt 1.7.0 - 1.7.5npm
clerk/react-router 1.5.0 - 1.6.4npm
clerk/remix 4.8.0 - 4.8.5npm
clerk/tanstack-react-start 0.16.0 - 0.18.3npm
Published Jul 09, 2025
Tracked Since Feb 18, 2026