CVE-2021-29459

Name: CVE-2021-29459
Creator: NVD / NIST
Published: 2021-04-20T19:15:09.67+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 1.12%

Last modified Jun 17, 2026

CVE-2021-29459 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. It is possible to persistently inject scripts in XWiki versions prior to 12.6.3 and 12.8. EPSS estimates a 1.12% chance of exploitation in the next 30 days.

Description

XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. It is possible to persistently inject scripts in XWiki versions prior to 12.6.3 and 12.8. Unregistred users can fill simple text fields. Registered users can fill in their personal information and (if they have edit rights) fill the values of static lists using App Within Minutes. There is no easy workaround except upgrading XWiki. The vulnerability has been patched on XWiki 12.8 and 12.6.3.

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

1.12%

62.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Xwiki	Xwiki	< 12.6.3
Xwiki	Xwiki	>= 12.6.4, < 12.8

References

https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-5c66-v29h-xjh8Exploit, Third Party Advisory
https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-5c66-v29h-xjh8Exploit, Third Party Advisory

Timeline

Published: Apr 20, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-29459?

How severe is CVE-2021-29459?

CVE-2021-29459 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 1.12% probability of exploitation in the next 30 days.

How do I fix CVE-2021-29459?

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-2021-29459?

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

Scan your code now

Source: NVD / NIST