CVE-2025-53548: high-severity vulnerability in clerk javascript
@clerk/backend Performs Insufficient Verification of Data Authenticity
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 0.2%
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Affected products
clerk · javascriptRelated CVEs — clerk javascript
In the same product, most dangerous first.
CVE-2024-22206CRITICAL@clerk/nextjs auth() and getAuth() methods vulnerable to insecure direct object reference (IDOR)EPSS 0.7%CVE-2026-34076HIGHClerk JavaScript: SSRF in the opt-in clerkFrontendApiProxy feature may leak secret keys to unintended hostEPSS 0.3%CVE-2026-42349HIGHClerk: Authorization bypass when combining organization, billing, or reverification checksEPSS 0.2%