How severe is CVE-2021-42194?

CVE-2021-42194 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-42194 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-42194?

CVE-2021-42194 affects Eyoucms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-42194?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-42194 published?

CVE-2021-42194 was published on 2022-03-20 and last updated on 2026-06-17.

CVE-2021-42194

CVE-2021-42194 is a high-severity vulnerability in Eyoucms with a CVSS 3.x base score of 7.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-611.

Key facts

Severity: High (CVSS 3.x base score 7.2)
CVSS v2: 6.5
EPSS exploit prediction: 1% (60th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-611
Affected product: Eyoucms
Published: 2022-03-20
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2021-42194?: CVE-2021-42194 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-42194 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-42194?: CVE-2021-42194 affects Eyoucms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-42194?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-42194 published?: CVE-2021-42194 was published on 2022-03-20 and last updated on 2026-06-17.

References

https://github.com/eyoucms/eyoucms/issues/19

Affected products (1)

cpe:2.3:a:eyoucms:eyoucms:1.5.4:*:*:*:*:*:*:*

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CVE-2018-1000837 — Critical (CVSS 10.0): UML Designer version <= 8.0.0 contains a XML External Entity (XXE) vulnerability in XML parser for plugins that can…
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