Vulnerability details
CVE-2026-77138
TYPO3 Extension "HTML5 Video Player vs. Powermail"
Remote Code Execution in extension "HTML5 Video Player vs. Powermail" (html5videoplayer_powermail)
CVSS 4.0
9.3Critical
Official description
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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.3Critical | 4.0 | CVEProject cvelistV5 (CNA) (TYPO3) | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| TYPO3 | Extension "HTML5 Video Player vs. Powermail" | v ≤ 0.2.1 | CVEProject cvelistV5 (CNA) |
References and advisories
1- https://typo3.org/security/advisory/typo3-ext-sa-2026-014 vendor-advisory
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Details
- Published
- 2026-08-25
- Last updated
- 2026-08-25
- State
- Published
- Assigner (CNA)
- TYPO3
Exploit prediction (EPSS)
0.71%
Probability of exploitation in 30 days
53.9%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-502Deserialization of Untrusted Data