CVE-2021-27131: XSS
First published: Tue May 16 2023(Updated: )
** DISPUTED ** 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).
Credit: cve@mitre.org cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Moodle Moodle | =3.10.1 | |
| composer/moodle/moodle | <=3.10.1 | |
| =3.10.1 |
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Reference Links
Frequently Asked Questions
What is the vulnerability ID for this Moodle vulnerability?
The vulnerability ID for this Moodle vulnerability is CVE-2021-27131.
What is the severity level of CVE-2021-27131?
The severity level of CVE-2021-27131 is medium with a CVSS score of 5.4.
How does the vulnerability affect Moodle 3.10.1?
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.
How can an attacker exploit CVE-2021-27131?
An attacker can exploit CVE-2021-27131 to steal admin and all user account credentials.
Are there any references available for this Moodle vulnerability?
Yes, you can find references for this Moodle vulnerability at the following links: [1] [2] [3].
- collector/nvd-index
- collector/github-advisory-latest
- alias/GHSA-w2pm-fr62-jgv4
- alias/CVE-2021-27131
- collector/nvd-cve
- collector/github-advisory
- agent/type
- agent/references
- agent/severity
- agent/author
- agent/weakness
- agent/status
- agent/softwarecombine
- agent/description
- collector/mitre-cve
- source/MITRE
- agent/tags
- agent/event
- agent/first-publish-date
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- agent/last-modified-date
- agent/trending
- status/disputed
- vendor/moodle
- canonical/moodle moodle
- version/moodle moodle/3.10.1
- package-manager/composer