CVE-2019-3851

Severity: medium (CVSS 4.3 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-03-26 · updated 2026-06-17

Description

A vulnerability was found in moodle before versions 3.6.3 and 3.5.5. There was a link to site home within the the Boost theme's secure layout, meaning students could navigate out of the page.

Affected products

Fedoraproject Fedora: all versions
Moodle: from 3.5.0 before 3.5.5; from 3.6.0 before 3.6.3 — fixed in 3.5.5, 3.6.3

How to fix

Upgrade to a fixed version: Moodle 3.5.5, 3.6.3. Check the vendor advisory for mitigations.

References

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3851
https://moodle.org/mod/forum/discuss.php?d=384014#p1547746
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3851
https://moodle.org/mod/forum/discuss.php?d=384014#p1547746

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