CVE-2023-23921

Moodle: reflected xss risk in some returnurl parameters

Description

The vulnerability was found Moodle which exists due to insufficient sanitization of user-supplied data in some returnurl parameters. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website. This flaw allows a remote attacker to perform cross-site scripting (XSS) attacks.

Category

6.1
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.21%
Vendor Advisory moodle.org
Published at:
Updated at:

References

Link Tags
http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-76810 patch
https://bugzilla.redhat.com/show_bug.cgi?id=2162526 third party advisory issue tracking
https://moodle.org/mod/forum/discuss.php?d=443272#p1782021 patch vendor advisory

Frequently Asked Questions

What is the severity of CVE-2023-23921?
CVE-2023-23921 has been scored as a medium severity vulnerability.
How to fix CVE-2023-23921?
To fix CVE-2023-23921, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-23921 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-23921 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-23921?
CVE-2023-23921 affects .
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