CVE-2020-25911: XML External Entity vulnerability in MODX CMS

critical Affects modx/revolution. Feed 2026.10.29.1, updated 2026-10-28; published 2021-11-01; advisory modified 2023-12-06.

XML External Entity vulnerability in MODX CMS

Package: modx/revolution Composer
Affected versions: <2.8.0
Fixed in: 2.8.0
Severity: critical CVSS 9.1
Exploitation: not on CISA KEV · EPSS 2% (83.9th percentile)
Published: 2021-11-01
Source: osv.dev

References

CWE-611

NVD record modx/revolution advisories

Am I affected?

Find out in one command. phpwarden checks your composer.lock against this advisory and 20,000+ others, ranked by real-world exploitation (CISA KEV + EPSS). Free, offline, open data.

# one-time install
pip install phpwarden

# then
phpwarden deps composer.lock

Or keep it checked automatically: GitHub Action · pre-commit hook · GitLab CI · Laravel artisan command

Install docs How findings are ranked

Related advisories

CVE-2018-1000207 high MODX Revolution Incorrect Access Control vulnerability same package: modx/revolution
CVE-2022-26149 high Unrestricted Upload of File with Dangerous Type in MODX Revolution same package: modx/revolution
CVE-2017-9069 high MODX Revolution allows overwriting .htaccess same package: modx/revolution
CVE-2017-1000067 high MODX Revolution blind SQL injection same package: modx/revolution
CVE-2018-20755 medium MODX Revolution vulnerable to XSS attack through its User Photo field same package: modx/revolution
CVE-2018-20756 medium MODX Revolution allows XSS via document resources same package: modx/revolution