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Fencer Vulns
critical 9.8

CVE-2020-35314 in the critical feed json

A remote code execution vulnerability in the installUpdateThemePluginAction function in index.php in WonderCMS 3.1.3, allows remote attacke…

published 2021-04-20 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-22990

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
26.9%
EPSS 26.9% chance of exploitation in 30 days, percentile 98%
public exploits
1
Exploit-DB

Summary

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.

Timeline

  1. First public exploit (EDB-49155)
  2. Published

Exploit prediction

26.91% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-49155 WonderCMS 3.1.3 - Authenticated Remote Code Execution webapps, 2020-12-02
  • zetc0de.github.io https://zetc0de.github.io/post/authenticated-rce-ssrf-wondercms/ referenced PoC, tagged "exploit" by a source, unverified
  • packetstormsecurity.com https://packetstormsecurity.com/files/160311/WonderCMS-3.1.3-Remote-Code-Execution.html referenced PoC, tagged "exploit" by a source, unverified
  • zetc0de.github.io https://zetc0de.github.io/post/authenticated-rce-ssrf-wondercms/#authenticated-remote-code-execution referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-78 Improper Neutralization of Special Elements used in an OS Command

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.