What is CVE-2021-42194?

CVE-2021-42194 is a high-severity vulnerability in Eyoucms, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 7.2/10. Published 2022-03-20.

How severe is CVE-2021-42194?

High severity. CVSS v3 base score is 7.2 out of 10.

XXE in Eyoucms

CVE-2021-42194

The wechat_return function in /controller/Index.php of EyouCms V1.5.4-UTF8-SP3 passes the user's input directly into the simplexml_ load_ String function, which itself does not prohibit external entities, triggering a XML external entity (XXE) injection vulnerability.

Vulnerability class: XXE (XML External Entity)

Published 2022-03-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.011 (63.7th percentile), scored 2026-10-04.

Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 63.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Eyoucms — versions 1.5.4

Weakness classification (CWE)

CWE-611 — Improper Restriction of XML External Entity Reference (XXE)

References

github.com/eyoucms/eyoucms/issues/19 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2021-42194?: CVE-2021-42194 is a high-severity vulnerability in Eyoucms, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 7.2/10. Published 2022-03-20.
How severe is CVE-2021-42194?: High severity. CVSS v3 base score is 7.2 out of 10.