PHPOffice Math allows XXE when processing an XML file in the MathML format

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS 4.0

8.7 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N · score source

EPSS

• CVE-2025-48882: 0.50% estimated exploitation activity in the next 30 days; percentile 42.64 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Product: Math Version: 0.2.0 CWE-ID: CWE-611: Improper Restriction of XML External Entity Reference CVSS vector v.4.0: 8.7 (AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N) CVSS vector v.3.1: 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N) Description: An attacker can create a special XML file, during which it processed, external entities are loaded, and it’s possible to read local server files. Impact: Local server files reading Vulnerable component: The loadXML function with the unsafe LIBXMLDTDLOAD flag, the MathML class Exploitation conditions: The vulnerability applies only to reading a file in the MathML format. Mitigation: If there is no option to refuse using the LIBXMLDTDLOAD flag, it’s recommended to filter external entities through the implementation of the custom external entity loader function. Researcher: Aleksandr Zhurnakov (Positive Technologies) Research Zero-day vulnerability was discovered in the Math library in the detailed process of the XXE vulnerability…

Published by the source

29 May 2025, 17:27 UTC

Last modified by the source

30 May 2025, 21:42 UTC

Source last checked

26 Oct 2026, 14:33 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-42hm-pq2f-3r7m

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2025-48882

Advisory: PHPOffice Math allows XXE when processing an XML file in the MathML format
IDs: CVE-2025-48882, GHSA-42hm-pq2f-3r7m
Record: https://patchnext.com/advisories/cve-2025-48882 (revision 1, source checked 26 Oct 2026, 14:33 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 8.7)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: phpoffice/math 0.3.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist phpoffice/math: affected <= 0.2.0; fixed in 0.3.0

## Suggested inspection (read-only)
- Packagist phpoffice/math: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on phpoffice/math.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-42hm-pq2f-3r7m (GitHub-reviewed advisory GHSA-42hm-pq2f-3r7m lists affected ranges: Packagist phpoffice/math >=0 <=0.2.0)

Commands are suggestions: review each one before running it.