High · CVSS 8.7CVE-2026-58143

Cotonti Siena 0.9.26 CSRF via admin.php Config Update Endpoint

Answer in brief

CVE-2026-58143 records a High severity (CVSS 8.7) vulnerability in Cotonti Siena 0.9.26 CSRF via admin.php Config Update Endpoint. The current sources do not mark it as known exploited. The current feed maps Cotonti/Cotonti (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jul 9, 2026Updated Oct 1, 2026Source checked Oct 1, 2026First seen by HOL Jul 10, 2026Material review Oct 1, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.7
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 8.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Cotonti/Cotonti (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Cotonti/Cotontigeneric	*	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Cotonti/Cotonti.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Jul 9, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 1, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Jul 10, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.