Humhub
CVE-2025-64442
HIGH
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Output encoding, context-aware escaping
MITRE ATT&CK
2 techniques across 2 tactics: Initial Access, Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS score of 7.1 (HIGH). Attack characteristics: network attack vector, low complexity, no privileges required, user interaction required. EPSS exploitation probability: 0.05%. |
| Exploit ScenarioDerived | A remote attacker could inject malicious scripts into web pages viewed by other users by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability. |
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Alert meAnalysisAIv1 – Mar 28, 2026
HumHub is an Open Source Enterprise Social Network. Rated high severity (CVSS 7.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Cross-Site Scripting (XSS) vulnerability could allow attackers to inject malicious scripts into web pages viewed by other users.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. HumHub is an Open Source Enterprise Social Network. Versions below 1.17.4 have a XSS vulnerability in the Meta-Search feature which allows malicious input to be executed in search previews. This issue is fixed in version 1.17.4. Affected products include: Humhub. Version information: version 1.17.4..
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
Lifecycle Timeline
2DescriptionGitHub Advisory
HumHub is an Open Source Enterprise Social Network. Versions below 1.17.4 have a XSS vulnerability in the Meta-Search feature which allows malicious input to be executed in search previews. This issue is fixed in version 1.17.4.
Executive ViewAI
Organizations using HumHub face moderate risk from CVE-2025-64442, a cross-site scripting vulnerability rated CVSS 7.1. Attackers could inject malicious scripts to steal user sessions, credentials, or perform actions on behalf of authenticated users. A patch is available and should be applied as part of regular vulnerability management.
Apply vendor patch. If immediate patching is not feasible: (1) Implement Content-Security-Policy headers; (2) Enable HttpOnly and SameSite cookie attributes; (3) Deploy WAF XSS/CSRF rules.
Threat Intelligence Overview
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Cross-Site Scripting occurs when an application accepts untrusted data and sends it to a web browser without proper validation or encoding.
Affected Products (CPE)GitHub Advisory
SQL injection vulnerability in the actionIndex function in protected/modules_core/notification/controllers/ListControlle
HumHub is an Open Source Enterprise Social Network. Rated medium severity (CVSS 6.5), this vulnerability is remotely exp
HumHub is an open-source social network kit written in PHP. Rated medium severity (CVSS 6.5), this vulnerability is remo
A cross-site scripting (XSS) vulnerability in HumHub 1.3.12 allows remote attackers to inject arbitrary web script or HT
Files is a module for managing files inside spaces and user profiles. Rated critical severity (CVSS 9.2), this vulnerabi
Stored XSS in HumHub Community Edition 1.18.4 and 1.18.4-pl1 allows authenticated low-privilege users to inject arbitrar
Stored cross-site scripting in HumHub 1.18.4 lets a Space administrator embed arbitrary HTML or JavaScript into the dele
Reflected cross-site scripting in HumHub Community Edition 1.18.4 allows a low-privileged attacker to inject arbitrary J
Stored cross-site scripting in HumHub 1.18.5 lets an authenticated user who holds the delegated, non-system-administrato
Broken access control in HumHub 1.13.0 through 1.18.2 lets any authenticated user delete every member of any Space, rega
HumHub Calendar module versions prior to 1.8.11 contain a stored XSS vulnerability in Event Types that allows attackers
Generation of Error Message Containing Sensitive Information in HumHub GmbH & Co. Rated medium severity (CVSS 6.9), this
GitHub PoC
Exploit-DB