AUGUST 24, 2026
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Case File

CVE-2026-58143

HIGH · CVSS 8.8 EPSS 0.18% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-07-09 · Last synced 2026-08-08

CyberRota Analysis

AI-Generated

Cotonti Siena versions 0.9.26 and earlier are vulnerable to a cross-site request forgery (CSRF) flaw that allows unauthenticated attackers to manipulate administrator settings by sending a forged POST request to the admin configuration handler. This exploitation can lead to the disabling of the PFS module's file extension whitelist, potentially allowing unauthorized users to upload and execute arbitrary PHP files on the server. Organizations using this software, particularly those with administrative access exposed, should prioritize patching this vulnerability to mitigate the risk of unauthorized file execution and server compromise.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-58143
Severity
HIGH
CVSS
8.8
EPSS
0.18%

Original NVD Description

Cotonti Siena 0.9.26 and earlier contains a cross-site request forgery vulnerability that allows unauthenticated attackers to modify administrator configuration by tricking a logged-in administrator into submitting a forged POST request to the admin.php config update handler, which never invokes the application's CSRF validation function. Attackers can disable the PFS module's file extension whitelist by setting pfsfilecheck to 0, enabling any user with PFS access to upload and execute arbitrary PHP files on the server.