CVE-2021-40369: XSS vulnerability on Denounce plugin

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-11-24 · updated 2026-06-17
Weakness: CWE-79

Description

A carefully crafted plugin link invocation could trigger an XSS vulnerability on Apache JSPWiki, related to the Denounce plugin, which could allow the attacker to execute javascript in the victim's browser and get some sensitive information about the victim. Apache JSPWiki users should upgrade to 2.11.0 or later.

Affected products

Apache Software Foundation Apache JSPWiki: before 2.11.0 — fixed in 2.11.0

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache JSPWiki 2.11.0. Check the vendor advisory for mitigations.

References

http://www.openwall.com/lists/oss-security/2022/08/03/3
https://jspwiki-wiki.apache.org/Wiki.jsp?page=CVE-2021-40369
https://lists.apache.org/thread/r2j00nrnpjgcmoxvlv3pgfoq9kzrcsfh
http://www.openwall.com/lists/oss-security/2022/08/03/3
https://jspwiki-wiki.apache.org/Wiki.jsp?page=CVE-2021-40369
https://lists.apache.org/thread/r2j00nrnpjgcmoxvlv3pgfoq9kzrcsfh

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