EUVD-2026-69300
GHSA-rh2h-qvw2-pj57
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Network-accessible REST API, no complexity or interaction needed, subscriber-level auth required; full system impact via RCE matches C:H/I:H/A:H.
Primary rating from Vendor (Wordfence).
CVSS VectorVendor: Wordfence
Lifecycle Timeline
2DescriptionCVE.org
The FS-Poster plugin for WordPress is vulnerable to Remote Code Execution in versions up to and including 8.0.1. This is due to insufficient input sanitization of the FFmpeg path parameter before passing it to the exec() function, combined with missing authorization checks on the REST API endpoints. This makes it possible for authenticated attackers, with subscriber-level access and above, to execute arbitrary commands on the underlying server.
Articles & Coverage 1
AnalysisAI
Remote code execution in the FS-Poster WordPress plugin (versions up to and including 8.0.1) allows any authenticated user with subscriber-level access to execute arbitrary OS commands on the underlying web server. The vulnerability combines two weaknesses: the FFmpeg path parameter accepted by the plugin's REST API is passed unsanitized to PHP's exec() function (CWE-77 command injection), and the REST API endpoints responsible for this functionality lack proper authorization checks. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid WordPress account at subscriber level or above - the lowest default authenticated role. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) accurately reflects the risk profile: network-exploitable, low complexity, no user interaction, and full CIA impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Update FS-Poster to a version above 8.0.1 as soon as a patched release is published by fs-code; check the vendor changelog at https://www.fs-poster.com/documentation/updates-changelogs for the exact fixed version. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, immediately deactivate and disable the FS-Poster plugin on all WordPress installations; audit subscriber-level account activity logs for unauthorized API access patterns. …
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Same weakness CWE-77 – Command Injection
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External POC / Exploit Code
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