---
title: "CVE-2025-52891\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2025-52891?format=md
keywords: index, follow
---

# CVE-2025-52891

Publication date 2 July 2025

Last updated 2 July 2025

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

## Cvss 3 Severity Score

**6.5 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2025-52891?format=md#impact-score)

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## Description

ModSecurity is an open source, cross platform web application firewall
(WAF) engine for Apache, IIS and Nginx. In versions 2.9.8 to before 2.9.11,
an empty XML tag can cause a segmentation fault. If SecParseXmlIntoArgs is
set to On or OnlyArgs, and the request type is application/xml, and at
least one XML tag is empty (eg <foo></foo>), then a segmentation fault
occurs. This issue has been patched in version 2.9.11. A workaround
involves setting SecParseXmlIntoArgs to Off.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| modsecurity | 26.04 LTS resolute | Needs evaluation |
| 25.10 questing | Ignored end of life, was needs-triage |
| 25.04 plucky | Ignored end of life, was needs-triage |
| 24.10 oracular | Ignored end of life, was needs-triage |
| 24.04 LTS noble | Needs evaluation |
| 22.04 LTS jammy | Needs evaluation |
| 20.04 LTS focal | Needs evaluation |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

6.5 · Medium

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Network |
  | Attack complexity | Low |
  | Privileges required | None |
  | User interaction | Required |
  | Scope | Unchanged |
  | Confidentiality impact | None |
  | Integrity impact | None |
  | Availability impact | High |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 6.5 · Medium |
  | Exploitability score | - |
  | Impact score | - |

**Vector:** CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-52891)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2025-52891)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2025-52891)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2025-52891)

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2025-52891>
* <https://github.com/owasp-modsecurity/ModSecurity/commit/ecd7b9736836eee391d25f35d5bd06a3ce35a45d>
* <https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-gw9c-4wfm-vj3x>