CVE-2021-3639

MediumCVSS 6.1/10Last modified Jun 17, 2026

Description

A flaw was found in mod_auth_mellon where it does not sanitize logout URLs properly. This issue could be used by an attacker to facilitate phishing attacks by tricking users into visiting a trusted web application URL that redirects to an external and potentially malicious server. The highest threat from this liability is to confidentiality and integrity.

Metrics

CVSS 3.1 6.1/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Weakness enumeration

CWE-601

Affected software

No affected versions have been published.

Timeline

Published: Aug 22, 2022
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2021

CVE-2021-363929.8In Moodle, an SQL injection risk was identified in the library fetching a user's enrolled courses.CVE-2021-363939.8In Moodle, an SQL injection risk was identified in the library fetching a user's recent courses.CVE-2021-363949.8In Moodle, a remote code execution risk was identified in the Shibboleth authentication plugin.CVE-2021-363957.5In Moodle, the file repository's URL parsing required additional recursion handling to mitigate the risk of recursion denial of service.CVE-2021-363967.5In Moodle, insufficient redirect handling made it possible to blindly bypass cURL blocked hosts/allowed ports restrictions, resulting in a b CVE-2021-363975.3In Moodle, insufficient capability checks meant message deletions were not limited to the current user.CVE-2021-363985.4In moodle, ID numbers displayed in the web service token list required additional sanitizing to prevent a stored XSS risk.CVE-2021-363995.4In Moodle, ID numbers displayed in the quiz override screens required additional sanitizing to prevent a stored XSS risk.CVE-2021-36407.0A flaw use-after-free in function sco_sock_sendmsg() of the Linux kernel HCI subsystem was found in the way user calls ioct UFFDIO_REGISTER CVE-2021-364005.3In Moodle, insufficient capability checks made it possible to remove other users' calendar URL subscriptions.CVE-2021-364014.8In Moodle, ID numbers exported in HTML data formats required additional sanitizing to prevent a local stored XSS risk.CVE-2021-364025.3In Moodle, Users' names required additional sanitizing in the account confirmation email, to prevent a self-registration phishing risk.