CVE-2021-27131

Moodle 3.10.1 is vulnerable to persistent/stored cross-site scripting (XSS) due to the improper input sanitization on the "Additional HTML Section" via "Header…

published May 16, 2023

CVSS
—
EPSS
1%
Percentile
52.2
In the wild
Unconfirmed
What it is

Moodle 3.10.1 is vulnerable to persistent/stored cross-site scripting (XSS) due to the improper input sanitization on the "Additional HTML Section" via "Header and Footer" parameter in /admin/settings.php. This vulnerability is leading an attacker to steal admin and all user account cookies by storing the malicious XSS payload in Header and Footer. NOTE: this is disputed by the vendor because the "Additional HTML Section" for "Header and Footer" can only be supplied by an administrator, who is intentionally allowed to enter unsanitized input (e.g., site-specific JavaScript).

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.00686 · 52.2th percentile
Published
2023-05-16T00:00Z
EPSS history
Timeline
  • 16 MAY 00:00Z
    Moodle 3.10.1 is vulnerable to persistent/stored cross-site scripting (XSS) due to the improper input sanitization on the "Additional HTML Section" via "Header…
    cvelistv5