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TI-2021-12966 Aliases CVE-2021-33580GHSA-x9w7-f6x8-r9xh

regex injection leading to DoS

Priority LOW 39CWE-400Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-400.

Summary

User controlled `request.getHeader("Referer")`, `request.getRequestURL()` and `request.getQueryString()` are used to build and run a regex expression. The attacker doesn't have to use a browser and may send a specially crafted Referer header programmatically. Since the attacker controls the string and the regex pattern he may cause a ReDoS by regex catastrophic backtracking on the server side. This problem has been fixed in Roller 6.0.2.

Why it matters now

EPSS 0.03298 88th percentileScored 2026-11-07
Fix Fixed Apache Roller (Apache Software Foundation): 6.0.2

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApacheApache RollerApache Roller to before 6.0.26.0.2Patch availableCNA
  • Apache Roller VendorApache Affected Apache Roller to before 6.0.2 Fixed in 6.0.2 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:apache:roller:*:*:*:*:*:*:*:*before 6.0.2VulnerableApache
  • cpe:2.3:a:apache:roller:*:*:*:*:*:*:*:* Versions before 6.0.2 Vulnerable ·Apache

Remediation

  • Fix · CNA Apache Roller (Apache Software Foundation) Fixed in 6.0.2

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-33580
  2. 2026-10-03 Alias added: GHSA-x9w7-f6x8-r9xh

References

Advisory 2

  • TI-2013-03684 Certain getText methods in the ActionSupport controller in Apache Roller before 5.0.2… CVSS 2.0MEDIUM 6.8
  • TI-2014-00028 The XML-RPC protocol support in Apache Roller before 5.0.3 allows attackers to conduct… CVSS 3.0CRITICAL 9.8
  • TI-2018-12297 Server-side request forgery in Apache Roller CVSS 3.0CRITICAL 9.8
  • TI-2015-00218 The weblog page template in Apache Roller 5.1 through 5.1.1 allows remote authenticated… CVSS 3.0HIGH 7.2
  • TI-2019-00207 Cross-site scripting in Apache Roller CVSS 3.1MEDIUM 6.1
  • TI-2012-02109 Multiple cross-site request forgery (CSRF) vulnerabilities in the admin/editor console in… CVSS 2.0MEDIUM 6.8
See all 13 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences