CVE-2024-21492

Name: CVE-2024-21492
Creator: NVD / NIST
Published: 2024-02-17T05:15:08.223+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.1/10EPSS 0.71%

Last modified Jun 17, 2026

CVE-2024-21492 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. All versions of the package github.com/greenpau/caddy-security are vulnerable to Insufficient Session Expiration due to improper user session invalidation upon clicking the "Sign Out" button. User sessions remain valid even after requests are sent to /logout and /oauth2/google/logout. EPSS estimates a 0.71% chance of exploitation in the next 30 days.

Description

All versions of the package github.com/greenpau/caddy-security are vulnerable to Insufficient Session Expiration due to improper user session invalidation upon clicking the "Sign Out" button. User sessions remain valid even after requests are sent to /logout and /oauth2/google/logout. Attackers who gain access to an active but supposedly logged-out session can perform unauthorized actions on behalf of the user.

Metrics

CVSS 3.1

8.1/10

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

EPSS Probability

0.71%

48.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Authcrunch	Caddy-Security	All versions

References

https://blog.trailofbits.com/2023/09/18/security-flaws-in-an-sso-plugin-for-caddy/Exploit, Press/Media Coverage, Third Party Advisory
https://github.com/greenpau/caddy-security/issues/272Issue Tracking, Vendor Advisory
https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMGREENPAUCADDYSECURITY-5920787Third Party Advisory
https://blog.trailofbits.com/2023/09/18/security-flaws-in-an-sso-plugin-for-caddy/Exploit, Press/Media Coverage, Third Party Advisory
https://github.com/greenpau/caddy-security/issues/272Issue Tracking, Vendor Advisory
https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMGREENPAUCADDYSECURITY-5920787Third Party Advisory

Timeline

Published: Feb 17, 2024
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2024-21492?

How severe is CVE-2024-21492?

CVE-2024-21492 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 0.71% probability of exploitation in the next 30 days.

How do I fix CVE-2024-21492?

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-2024-21492?

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

Scan your code now

Source: NVD / NIST