CVE-2020-35313

CRITICAL

WonderCMS 3.1.3 - Code Execution via Theme Installer SSRF

Title source: manual
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2020-35313. PoCs published by zetc0de.

AI-analyzed exploit summary This exploit leverages an authenticated SSRF vulnerability in WonderCMS 3.1.3 to achieve remote code execution via a Gopher payload targeting FastCGI on port 9000. It requires valid credentials and sends a reverse shell payload to the attacker's specified host and port.

Description

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.

Exploits (1)

exploitdb WORKING POC
by zetc0de · pythonwebappsphp
https://www.exploit-db.com/exploits/49154

This exploit leverages an authenticated SSRF vulnerability in WonderCMS 3.1.3 to achieve remote code execution via a Gopher payload targeting FastCGI on port 9000. It requires valid credentials and sends a reverse shell payload to the attacker's specified host and port.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: WonderCMS 3.1.3
Auth required
Prerequisites: Valid authenticated session · FastCGI running on port 9000 · Network access to the target
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Exploit, Third Party Advisory x_refsource_misc
https://zetc0de.github.io/post/authenticated-rce-ssrf-wondercms/
Product, Third Party Advisory x_refsource_misc
https://github.com/robiso/wondercms

Scores

CVSS v3 9.8
EPSS 0.4522
EPSS Percentile 98.6%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-918
Status published
Products (1)
wondercms/wondercms 3.1.3
Published Apr 20, 2021
Tracked Since Feb 18, 2026