CVE-2021-43558
A URL parameter in the filetype site administrator tool required extra sanitizing to prevent a reflected XSS risk.
Does this matter?
Lower severity and a low EPSS score (0.87%). Track it; it rarely justifies an emergency change on its own.
Description
A flaw was found in Moodle in versions 3.11 to 3.11.3, 3.10 to 3.10.7, 3.9 to 3.9.10 and earlier unsupported versions. A URL parameter in the filetype site administrator tool required extra sanitizing to prevent a reflected XSS risk.
- CVSS 3.1
- 6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 0.87% probability · 59th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- moodle/moodle · fedoraproject/extra packages for enterprise linux · fedoraproject/fedora
- Source
- patrick@puiterwijk.org
EPSS 0.9% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2021515Issue Tracking, Third Party Advisory
- https://moodle.org/mod/forum/discuss.php?d=429097Patch, Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2021515Issue Tracking, Third Party Advisory
- https://moodle.org/mod/forum/discuss.php?d=429097Patch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.