---
id: CVE-2026-91204
title: >-
  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 an…
summary: >-
  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 an…
severity: medium
cvss: 6.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
vendor: Apache Software Foundation
product: Apache Roller
affected:
  - apache_roller 6.1.5
published: '2026-09-28'
updated: '2026-09-28'
sourceUpdated: '2026-09-28T09:17:07.807'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-91204'
references:
  - url: 'https://github.com/apache/roller/pull/190'
    label: security@apache.org
  - url: 'https://lists.apache.org/thread/4qzp8m0438056l5t6m6719ob79gx72lz'
    label: security@apache.org
  - url: 'http://www.openwall.com/lists/oss-security/2026/09/25/23'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-28T08:05:44.643Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.