CVE-2021-25976

Name: CVE-2021-25976
Creator: NVD / NIST
Published: 2021-11-16T09:15:06.717+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.1/10EPSS 0.44%

Last modified Jun 17, 2026

CVE-2021-25976 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. In PiranhaCMS, versions 4.0.0-alpha1 to 9.2.0 are vulnerable to cross-site request forgery (CSRF) when performing various actions supported by the management system, such as deleting a user, deleting a role, editing a post, deleting a media folder etc., when an ID is known.. EPSS estimates a 0.44% chance of exploitation in the next 30 days.

Description

In PiranhaCMS, versions 4.0.0-alpha1 to 9.2.0 are vulnerable to cross-site request forgery (CSRF) when performing various actions supported by the management system, such as deleting a user, deleting a role, editing a post, deleting a media folder etc., when an ID is known.

Metrics

CVSS 3.1

8.1/10

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

EPSS Probability

0.44%

35.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Dotnetfoundation	Piranha Cms	>= 4.0.1, <= 9.2
Dotnetfoundation	Piranha Cms	4.0.0

References

https://github.com/PiranhaCMS/piranha.core/commit/e42abacdd0dd880ce9cf6607efcc24646ac82edaPatch, Third Party Advisory
https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25976Third Party Advisory
https://github.com/PiranhaCMS/piranha.core/commit/e42abacdd0dd880ce9cf6607efcc24646ac82edaPatch, Third Party Advisory
https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25976Third Party Advisory

Timeline

Published: Nov 16, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-25976?

How severe is CVE-2021-25976?

CVE-2021-25976 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 0.44% probability of exploitation in the next 30 days.

How do I fix CVE-2021-25976?

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-2021-25976?

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

Scan your code now

Source: NVD / NIST