Vulnerability DatabaseCVE-2021-40691
Mend.io Vulnerability Database
The largest open source vulnerability database
What is a Vulnerability ID?
New vulnerability? Tell us about it!
CVE-2021-40691
Published:January 21, 2022
Updated:May 18, 2026
A session hijack risk was identified in the Shibboleth authentication plugin.
Affected Packages
moodle/moodle (PHP):
Affected version(s) >=v3.10.0 <v3.10.7
Fix Suggestion:
Update to version v3.10.7
moodle/moodle (PHP):
Affected version(s) >=v3.11.0 <v3.11.3
Fix Suggestion:
Update to version v3.11.3
moodle/moodle (PHP):
Affected version(s) >=v3.9.0 <v3.9.10
Fix Suggestion:
Update to version v3.9.10
Related Resources (3)
https://nvd.nist.gov/vuln/detail/CVE-2021-40691
https://bugzilla.redhat.com/show_bug.cgi?id=2043411
https://github.com/moodle/moodle
Do you need more information?
Contact Us
CVSS v4
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
4.3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
EPSS
Base Score:
0.38