Moodle Cross-site Scripting
An issue was discovered in Moodle 3.x. An authenticated user is allowed to add HTML blocks containing scripts to their Dashboard; this is normally not a security issue because a personal dashboard is visible to this user only. Through this security vulnerability, users can move such a block to other pages where they can be viewed by other users.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | moodle/moodle | >= 3.1, < 3.1.12, >= 3.2, < 3.2.9, >= 3.3, < 3.3.6, >= 3.4, < 3.4.3 | 3.1.12, 3.2.9, 3.3.6, 3.4.3 |
References
- CVSS vector
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N- Weakness (CWE)
CWE-79- Platform
- Composer
- Package
moodle/moodle- Disclosed
- 13.05.2022
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-xhfw-wjjc-4j5h - CC BY 4.0
Vulnerability history: moodle/moodle
All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 437
- First → latest
- 03.2021 02.2026
- Without a fix
- 10
- Exploited in attacks
- 0
Severity breakdown
- Critical 16
- High 68
- Medium 318
- Low 35
Disclosures per year
- 2021: 11
- 2022: 285
- 2023: 43
- 2024: 53
- 2025: 33
- 2026: 12
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Moodle Cross-site Scripting this entry
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