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CVE-2026-77138— Remote Code Execution in extension "HTML5 Video Player vs. Powermail" (html5videoplayer_powermail)

Quick assessment

Affected
TYPO3 Extension "HTML5 Video Player vs. Powermail"
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

TYPO3 HTML5 Video Player vs. Powermail是TYPO3组织的一款内容管理系统插件。 TYPO3 HTML5 Video Player vs. Powermail 0.2.1及之前版本存在反序列化注入漏洞，该漏洞源于对攻击者控制的cookie中的不可信客户端输入处理不当，直接传递给PHP的unserialize()函数，可能导致PHP对象注入，攻击者能够远程执行代码。

CVSS 9.3 · Critical EPSS 0.72% · P53

Affected Version Matrix 1

VendorProduct Version RangeStatus
TYPO3 Extension "HTML5 Video Player vs. Powermail" ≤ 0.2.1 affected
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I. Basic Information for CVE-2026-77138

Vulnerability Information
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Vulnerability Title
Remote Code Execution in extension "HTML5 Video Player vs. Powermail" (html5videoplayer_powermail)
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
Source: CVE Program / CVE List V5
Vulnerability Title
TYPO3 HTML5 Video Player vs. Powermail 反序列化注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TYPO3 HTML5 Video Player vs. Powermail是TYPO3组织的一款内容管理系统插件。 TYPO3 HTML5 Video Player vs. Powermail 0.2.1及之前版本存在反序列化注入漏洞，该漏洞源于对攻击者控制的cookie中的不可信客户端输入处理不当，直接传递给PHP的unserialize()函数，可能导致PHP对象注入，攻击者能够远程执行代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
TYPO3 Extension "HTML5 Video Player vs. Powermail" 0 ~ 0.2.1 -

II. Public POCs for CVE-2026-77138

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III. Intelligence Information for CVE-2026-77138

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Vendor Advisories for CVE-2026-77138 (1)

Same Patch Batch · TYPO3 · 2026-08-25 · 24 CVEs total

CVE-2026-77136 9.5 CRITICAL Server-Side Template Injection in extension "powermail" (powermail)
CVE-2026-77142 8.8 HIGH Broken Access Control in extension "Industry Directory" (yellowpages2)
CVE-2026-77143 8.8 HIGH Broken Access Control in extension "Forum" (pforum)
CVE-2026-77141 8.8 HIGH Broken Access Control in extension "Club Directory" (clubdirectory)
CVE-2026-77140 8.7 HIGH Broken Access Control in extension "Telephone Directory" (telephonedirectory)
CVE-2026-77146 8.3 HIGH Broken Access Control in extension "femanager" (femanager)
CVE-2026-77134 8.3 HIGH Broken Access Control in extension "femanager" (femanager)
CVE-2026-77135 8.2 HIGH Information Disclosure in extension "femanager" (femanager)
CVE-2026-77129 7.7 HIGH Server-Side Template Injection in extension "Event management and registration" (sf_event_
CVE-2026-77137 7.7 HIGH SQL Injection in extension "Forms Export" (frp_form_answers)
CVE-2026-56095 7.7 HIGH Insecure Deserialization in extension "Apache Solr for TYPO3 - Enterprise Search" (solr)
CVE-2026-56092 7.6 HIGH Broken Access Control in extension "Apache Solr for TYPO3 - Enterprise Search" (solr)
CVE-2026-77144 7.1 HIGH Broken Access Control in extension "Events 2" (events2)
CVE-2026-77145 7.1 HIGH Broken Access Control in extension "Events 2" (events2)
CVE-2026-56094 6.3 MEDIUM Information Disclosure in extension "Apache Solr for TYPO3 - Enterprise Search" (solr)
CVE-2026-56093 6.3 MEDIUM Broken Access Control in extension "Apache Solr for TYPO3 - Enterprise Search" (solr)
CVE-2026-56096 6.3 MEDIUM Information Disclosure in extension "Apache Solr for TYPO3 - Enterprise Search" (solr)
CVE-2026-77128 6.3 MEDIUM Broken Access Control in extension "Event management and registration" (sf_event_mgt)
CVE-2026-77139 6.0 MEDIUM Path Traversal in extension "Mask" (mask)
CVE-2026-77127 6.0 MEDIUM Information Disclosure in extension "Modules" (modules)

Showing top 20 of 24 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same vendor: TYPO3
Same weakness: CWE-502

V. Comments for CVE-2026-77138

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