by Kastro
Paper/Archive/CVE-2026-77138

CVE-2026-77138

TYPO3 Extension "HTML5 Video Player vs. Powermail" — Remote Code Execution in extension "HTML5 Video Player vs. Powermail" (html5videoplayer_powermail)

EPSS 0.7%CVSS 9.3
critical.is priorityof 100
39
CVSS 9.3 (CNA)9.3 / 10 × 3027.9Not in CISA KEV+300.0EPSS percentile 53.8.538 × 2010.8No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
Extension "HTML5 Video Player vs. Powermail"≤ 0.2.1–CNA

Scores by source

TYPO3 (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

advisorytypo3.org/security/advisory/typo3-ext-sa-2026-014