What is CVE-2017-1000223?

CVE-2017-1000223 is a medium-severity vulnerability in Modx Revolution, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2017-11-17.

How severe is CVE-2017-1000223?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Modx Revolution

CVE-2017-1000223

A stored web content injection vulnerability (WCI, a.k.a XSS) is present in MODX Revolution CMS version 2.5.6 and earlier. An authenticated user with permissions to edit users can save malicious JavaScript as a User Group name and potentially take control over victims' accounts. This can lead to an escalation of privileges providing complete administrative control over the CMS.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2017-11-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.005 (41.8th percentile), scored 2026-10-24.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 41.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Modx Revolution

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

raw.githubusercontent.com/modxcms/revolution/v2.5.7-pl/core/docs/changelog.txt (Third Party Advisory, Release Notes)

Frequently asked questions

What is CVE-2017-1000223?: CVE-2017-1000223 is a medium-severity vulnerability in Modx Revolution, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2017-11-17.
How severe is CVE-2017-1000223?: Medium severity. CVSS v3 base score is 5.4 out of 10.