YesWiki before 4.6.7 contains an authentication bypass in the contact mail AJAX handler that allows unauthenticated attackers to send email through… (CVE-2026-104446)
YesWiki versions prior to 4.6.7 have an authentication bypass vulnerability in the contact mail AJAX handler. This flaw allows unauthenticated attackers to send emails through the wiki's SMTP server by crafting POST XMLHttpRequests without required parameters. The vulnerability can be exploited to send arbitrary emails, potentially facilitating spam or phishing attacks.
AI Analysis
Technical Summary
The vulnerability in YesWiki before version 4.6.7 is an authentication bypass in the contact mail AJAX handler. Attackers can send POST XMLHttpRequests to the mail handler endpoint without providing the expected field or type parameters, enabling them to specify arbitrary recipient, sender, subject, and body fields. This allows unauthenticated users to relay emails through the wiki's SMTP server, which can be abused for spam or phishing campaigns. The CVSS 3.1 base score is 6.5, indicating a medium severity with network attack vector, low attack complexity, no privileges required, no user interaction, and impacts on integrity and availability.
Potential Impact
Unauthenticated attackers can send arbitrary emails through the YesWiki SMTP server, potentially enabling spam or phishing attacks. The vulnerability does not impact confidentiality but affects integrity and availability of the mail service. This could lead to reputational damage and abuse of the mail infrastructure.
Mitigation Recommendations
A fix is available in YesWiki version 4.6.7. Users should upgrade to version 4.6.7 or later to remediate this authentication bypass vulnerability. No other mitigation or temporary workaround is provided in the available data.
YesWiki before 4.6.7 contains an authentication bypass in the contact mail AJAX handler that allows unauthenticated attackers to send email through… (CVE-2026-104446)
Description
YesWiki versions prior to 4.6.7 have an authentication bypass vulnerability in the contact mail AJAX handler. This flaw allows unauthenticated attackers to send emails through the wiki's SMTP server by crafting POST XMLHttpRequests without required parameters. The vulnerability can be exploited to send arbitrary emails, potentially facilitating spam or phishing attacks.
CVSS v3.1
Score 6.5medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in YesWiki before version 4.6.7 is an authentication bypass in the contact mail AJAX handler. Attackers can send POST XMLHttpRequests to the mail handler endpoint without providing the expected field or type parameters, enabling them to specify arbitrary recipient, sender, subject, and body fields. This allows unauthenticated users to relay emails through the wiki's SMTP server, which can be abused for spam or phishing campaigns. The CVSS 3.1 base score is 6.5, indicating a medium severity with network attack vector, low attack complexity, no privileges required, no user interaction, and impacts on integrity and availability.
Potential Impact
Unauthenticated attackers can send arbitrary emails through the YesWiki SMTP server, potentially enabling spam or phishing attacks. The vulnerability does not impact confidentiality but affects integrity and availability of the mail service. This could lead to reputational damage and abuse of the mail infrastructure.
Mitigation Recommendations
A fix is available in YesWiki version 4.6.7. Users should upgrade to version 4.6.7 or later to remediate this authentication bypass vulnerability. No other mitigation or temporary workaround is provided in the available data.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-c595-8pv9-m3vm
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-104446"]
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
Threat ID: 6abfee93a43b0b3b89e55141
Added to database: 10/02/2026, 17:49:07 UTC
Last enriched: 10/02/2026, 17:59:52 UTC
Last updated: 10/02/2026, 21:06:10 UTC
Views: 2
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