What’s Vulnerable › Vulnerabilities
CVE-2026-91204: Apache Roller: Stored javascript: URI in HTML comments
- Severity: medium (CVSS 6.1 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-09-28 · updated 2026-09-30
- Weakness: CWE-79
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.
Affected products
References
- 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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