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Fencer Vulns
critical 9.8

CVE-2020-35313 in the critical feed json

A server-side request forgery (SSRF) vulnerability in the addCustomThemePluginRepository function in index.php in WonderCMS 3.1.3 allows re…

published 2021-04-20 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-22989

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
45.2%
EPSS 45.2% chance of exploitation in 30 days, percentile 98%
public exploits
1
Exploit-DB

Summary

A server-side request forgery (SSRF) vulnerability in the addCustomThemePluginRepository function in index.php in WonderCMS 3.1.3 allows remote attackers to execute arbitrary code via a crafted URL to the theme/plugin installer.

Timeline

  1. First public exploit (EDB-49154)
  2. Published

Exploit prediction

45.22% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-49154 WonderCMS 3.1.3 - Authenticated SSRF to Remote 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/160310/WonderCMS-3.1.3-Code-Execution-Server-Side-Request-Forgery.html 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-918 Server-Side Request Forgery

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.