CSRF in Cotonti
CVE-2026-58143
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.
Vulnerability class: CSRF (Cross-Site Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (13.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 13th percentile — 13.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Cotonti — versions 0
Weakness classification (CWE)
References
- Researcher Disclosure (technical-description, exploit)
- www.vulncheck.com/advisories/cotonti-siena-csrf-via-admin-php-config-update-end… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-58143?
- CVE-2026-58143 is a high-severity vulnerability in Cotonti, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.8/10. Published 2026-07-09.
- How severe is CVE-2026-58143?
- High severity. CVSS v3 base score is 8.8 out of 10.