CVE-2025-53548

Name: CVE-2025-53548
Creator: NVD / NIST
Published: 2025-07-09T18:15:24.157+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.15%

Last modified Jun 17, 2026

CVE-2025-53548 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 0.15% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS Probability

0.15%

4.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-345

References

https://github.com/clerk/javascript/security/advisories/GHSA-9mp4-77wg-rwx9

Timeline

Published: Jul 9, 2025
Last Modified: Jun 17, 2026
Status: Deferred

Frequently Asked Questions

What is CVE-2025-53548?

How severe is CVE-2025-53548?

CVE-2025-53548 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.15% probability of exploitation in the next 30 days.

How do I fix CVE-2025-53548?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-53548?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST