FearlessCMS: Remote Code Execution via Unvalidated Update Repository URL in System Updater (fearlessgeekmedia FearlessCMS)

CVE-2026-55695

CRITICAL 9.1

En bref

Source: NVD
EPSS: EPSS 0.46 % · centile 40 (2026-10-29)
État: PUBLISHED
Publiée: 2026-10-13 15:51 UTC
Mise à jour: 2026-10-13 16:12 UTC
Attribuée par: GitHub_M
Statut NVD: Deferred

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Description

FearlessCMS is a flat-file content management system centered on simplicity and open source. In 0.1.2b and earlier, an authenticated administrator can set an arbitrary Git repository URL through admin/updater-handler.php and trigger perform_update, which passes the URL to update.sh. The updater clones the repository and replaces the live plugins/, admin/, and includes/ directories without verifying the repository's identity, signatures, or contents. Because router.php permits existing PHP files under plugins to be executed by the PHP development server, attacker-supplied update content can execute arbitrary PHP with the web server process's privileges and persist as a backdoor. This issue is fixed in version 0.1.3b.

Faiblesses (CWE)

CWE-94 — Injection de code

Références

Scores

Version	Score	Vecteur	Évalué par
CVSS 3.1	CRITICAL 9.1	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H	GitHub_M
CVSS 3.1	CRITICAL 9.1	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H	NVD · security-advisories@github.com (Secondary)

Références européennes

ENISA EUVD · EUVD-2026-98836
GCVE · GCVE-0-2026-55695

Produits affectés

Produit	Versions
fearlessgeekmedia · FearlessCMS	affected < 0.1.3b

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD

💣 FearlessCMS: Remote Code Execution via Unvalidated Update Repository URL in System Updater (fearlessgeekmedia FearlessCMS)