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VulnerabilityPublished Updated

CVE-2026-91204: Apache Roller · Cross-site Scripting

Affects Apache RollerSource CVE Database V5

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Not known to be exploited · CVSS 6.1 Medium · fixed in 6.1.6 : update Apache Roller when convenient.

Data as of 12 Nov 2026, 23:25 UTC

CVSS 3.1 base score
6.1Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 16% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 6.1.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 28 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 13 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Apache Software FoundationApache RollerAffected
  • =6.1.5
Fixed in–
Mavenorg.apache.roller/rollerpkg:maven/org.apache.roller/rollerOther threatsAffected
  • =6.1.5
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Users should upgrade to Apache Roller version 6.1.6 or later, which includes an official fix restricting restored links to safe URI schemes (http, https, mailto). Sites that do not enable HTML in comments or do not use the HTMLSubset comment formatter are not affected. No other mitigations are indicated.

Description

Apache Roller 6.1.5 contains a cross-site scripting (XSS) vulnerability due to improper neutralization of input during web page generation. An anonymous remote attacker can store a comment with a javascript: URI link that bypasses HTML comment formatting and executes script when clicked by a visitor. This issue affects sites with HTML enabled in comments and using the HTMLSubset comment formatter. The vulnerability is fixed in Apache Roller 6.1.6 and later by restricting restored links to http, https, and mailto URIs.

References

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