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Vulnerability record · CVE-2026-91204 · published 28 September 2026

CVE-2026-91204: Cross-site scripting vulnerability

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Apache Roller 6.1.5 allows an anonymous remote attacker to store a comment containing a javascript: URI link that survives HTML comment formatting and can execute script in the browser of a visitor who clicks it. This affects only sites that enable HTML in comments (users.comments.htmlenabled=true) together with the HTMLSubset comment formatter; comment moderation, where enabled, delays publication. Users are recommended to upgrade to Apache Roller 6.1.6 or later, which restricts restored links to http, https and mailto URIs.

6.1 CVSS 3.1 Medium CWE-79 · Cross-site scripting Received
6.1CVSS 3.1 base score
—EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
28 Sep 2026Last modified by NVD

Description

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Apache Roller 6.1.5 allows an anonymous remote attacker to store a comment containing a javascript: URI link that survives HTML comment formatting and can execute script in the browser of a visitor who clicks it. This affects only sites that enable HTML in comments (users.comments.htmlenabled=true) together with the HTMLSubset comment formatter; comment moderation, where enabled, delays publication. Users are recommended to upgrade to Apache Roller 6.1.6 or later, which restricts restored links to http, https and mailto URIs.

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

References

LinkTags
https://github.com/apache/roller/pull/190
https://lists.apache.org/thread/4qzp8m0438056l5t6m6719ob79gx72lz
http://www.openwall.com/lists/oss-security/2026/09/25/23

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Source: NIST National Vulnerability Database (record CVE-2026-91204), CISA KEV, FIRST EPSS. This page is refreshed as NVD updates the record.