How severe is CVE-2020-35314?

CVE-2020-35314 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-35314 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 27% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-35314?

CVE-2020-35314 affects Wondercms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-35314?

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

When was CVE-2020-35314 published?

CVE-2020-35314 was published on 2021-04-20 and last updated on 2026-06-17.

CVE-2020-35314

CVE-2020-35314 is a critical-severity vulnerability in Wondercms with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 27% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 27% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Wondercms
Published: 2021-04-20
Last modified: 2026-06-17

Description

A remote code execution vulnerability in the installUpdateThemePluginAction function in index.php in WonderCMS 3.1.3, allows remote attackers to upload a custom plugin which can contain arbitrary code and obtain a webshell via the theme/plugin installer.

Frequently asked questions

What is CVE-2020-35314?: A remote code execution vulnerability in the installUpdateThemePluginAction function in index.php in WonderCMS 3.1.3, allows remote attackers to upload a custom plugin which can contain arbitrary code and obtain a webshell via the theme/plugin installer.
How severe is CVE-2020-35314?: CVE-2020-35314 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-35314 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 27% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-35314?: CVE-2020-35314 affects Wondercms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-35314?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-35314 published?: CVE-2020-35314 was published on 2021-04-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:wondercms:wondercms:3.1.3:*:*:*:*:*:*:*

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