CVE-2026-104470
Deferred Deferred - Pending Action

Server-Side Request Forgery in YesWiki via Bazar valeur Action

Publication date: 2026-10-02

Last updated on: 2026-10-02

Assigner: VulnCheck

Description
YesWiki before 4.6.7 contains a server-side request forgery vulnerability in the Bazar valeur action that allows page editors to make the server fetch arbitrary URLs. Attackers can supply loopback or internal URLs in the url parameter to probe internal services and inject unescaped remote HTML that executes scripts in viewers' browsers.

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Meta Information

Published
2026-10-02
Last Modified
2026-10-02
Generated
2026-10-02
AI Q&A
2026-10-02
EPSS Evaluated
N/A
NVD
CVE-2026-104470
EUVD
EUVD-2026-91481

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
yeswiki yeswiki to 4.6.7 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

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Executive Summary

YesWiki before version 4.6.7 has a server-side request forgery (SSRF) vulnerability in the Bazar valeur action. This allows page editors to make the server fetch arbitrary URLs by supplying loopback or internal URLs in the url parameter. The server may then inject unescaped remote HTML, which can execute scripts in the browsers of users viewing the page.

Detection Guidance

Check YesWiki installations for versions before 4.6.7. Look for unusual outbound requests from the server, especially to internal or loopback addresses. Inspect logs for Bazar valeur action usage with external URLs.

Impact Analysis

An attacker with page editing privileges could exploit this to probe internal services on your network, potentially accessing sensitive data or internal systems. They could also inject malicious scripts that run in the browsers of other users viewing the page, leading to data theft or unauthorized actions on behalf of users.

Compliance Impact

This vulnerability could lead to unauthorized access to personal data, violating GDPR and HIPAA requirements for data protection and access controls. Organizations may face compliance breaches, legal penalties, and reputational damage if exploited.

Mitigation Strategies

Upgrade YesWiki to version 4.6.7 or later. Restrict access to the Bazar valeur action for untrusted users. Monitor network traffic for suspicious outbound connections from the server.

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