CVE-2018-20756: MODX Revolution allows XSS via document resources

medium Affects modx/revolution. Feed 2026.10.29.1, updated 2026-10-28; published 2022-05-14; advisory modified 2025-07-11.

MODX Revolution allows XSS via document resources

Package: modx/revolution Composer
Affected versions: <2.7.1-pl
Fixed in: 2.7.1-pl
Severity: medium CVSS 6.1
Exploitation: not on CISA KEV · EPSS 1% (58.3th percentile)
Published: 2022-05-14
Source: osv.dev

References

CWE-79

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-2020-25911 critical XML External Entity vulnerability in MODX CMS 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