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CRITICAL severity

PHPOffice Common Improper Restriction of XML External Entity ReferenceGHSA-2853-hf2g-9843

CRITICALFix: PHPOffice/Common#23

GHSA-2853-hf2g-9843 is a critical-severity (CVSS 9.8) XML External Entity (XXE) vulnerability in phpoffice/common. A fix is available for phpoffice/common — see the affected versions and patch details below.

Also known asCVE-2018-14065
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 4, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
2.2%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs82th percentile — riskier than 82% of all scored CVEsHighest risk
0.00%0.90%1.81%2.71%0.4%2.2%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🐘phpoffice/common

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

XMLReader.php in PHPOffice Common before 0.2.9 allows XXE.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistphpoffice/commonall versions0.2.9composer require phpoffice/common:^0.2.9

Affected Products

1 product · 1 configurations
Application
commonphpoffice_project
< 0.2.9
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for phpoffice/common, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update phpoffice/common to 0.2.9 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-2853-hf2g-9843 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

`XMLReader.php` in PHPOffice Common before 0.2.9 allows XXE.
O3 Security · Impact-Aware SCA

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PHPOffice Common Improper Restriction of XML External…