A flaw was found in Moodle. Insufficient sanitization of username input on the password reset page allows a remote attacker to conduct a cross-site… (CVE-2026-102586)
A cross-site scripting (XSS) vulnerability exists in Moodle due to insufficient sanitization of username input on the password reset page. This flaw allows a remote attacker to craft a malicious password reset link that, when visited by an unauthenticated user, executes arbitrary scripts in the victim's browser. The vulnerability has a medium severity rating with a CVSS score of 4.3.
AI Analysis
Technical Summary
Moodle contains a vulnerability identified as CVE-2026-102586 where the username input on the password reset page is not properly sanitized. This allows remote attackers to perform cross-site scripting (XSS) attacks by tricking unauthenticated users into visiting specially crafted password reset URLs, resulting in arbitrary script execution in the victim's browser.
Potential Impact
Successful exploitation could lead to execution of arbitrary scripts in the context of the victim's browser session on the Moodle site. This may allow attackers to perform actions such as stealing session cookies or manipulating the user interface, but does not directly impact confidentiality, integrity, or availability of Moodle itself as per the CVSS vector (Confidentiality: Low, Integrity: None, Availability: None).
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch information is provided in the available data. Until a patch is available, users should exercise caution when clicking on password reset links from untrusted sources.
A flaw was found in Moodle. Insufficient sanitization of username input on the password reset page allows a remote attacker to conduct a cross-site… (CVE-2026-102586)
Description
A cross-site scripting (XSS) vulnerability exists in Moodle due to insufficient sanitization of username input on the password reset page. This flaw allows a remote attacker to craft a malicious password reset link that, when visited by an unauthenticated user, executes arbitrary scripts in the victim's browser. The vulnerability has a medium severity rating with a CVSS score of 4.3.
CVSS v3.1
Score 4.3medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Moodle contains a vulnerability identified as CVE-2026-102586 where the username input on the password reset page is not properly sanitized. This allows remote attackers to perform cross-site scripting (XSS) attacks by tricking unauthenticated users into visiting specially crafted password reset URLs, resulting in arbitrary script execution in the victim's browser.
Potential Impact
Successful exploitation could lead to execution of arbitrary scripts in the context of the victim's browser session on the Moodle site. This may allow attackers to perform actions such as stealing session cookies or manipulating the user interface, but does not directly impact confidentiality, integrity, or availability of Moodle itself as per the CVSS vector (Confidentiality: Low, Integrity: None, Availability: None).
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch information is provided in the available data. Until a patch is available, users should exercise caution when clicking on password reset links from untrusted sources.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-rfv4-mv3r-qx66
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-102586"]
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6abd30852a4e24523d3401e9
Added to database: 09/30/2026, 15:53:41 UTC
Last enriched: 09/30/2026, 16:08:45 UTC
Last updated: 10/01/2026, 05:08:50 UTC
Views: 7
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