CVE-2026-77138 — Remote Code Execution in extension "HTML5 Video Player vs. Powermail" (html5videoplayer_powermail)
The extension fails to safely process untrusted client input of an attacker-controlled cookie directly to PHP's unserialize(). A remote, unauthenticated attacker can supply a cr…
Published: 2026-08-25 · CVSS: 9.3 · CVSS 4.0
The extension fails to safely process untrusted client input of an attacker-controlled cookie directly to PHP's unserialize(). A remote, unauthenticated attacker can supply a crafted serialized payload to trigger PHP Object Injection, leading to Remote Code Execution on the TYPO3 server.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7