Moodle SSRF Vulnerability
The edit_blog.php script allows a registered user to add external RSS feed resources. It was identified that this feature could be abused to be used as a SSRF attack vector by adding a malicious URL/TCP PORT in order to target internal network or an internet hosted server, bypassing firewall rules, IP filtering and more.
This kind of vulnerability is then called “blind” because of no response available on Moodle web site, enforcing attacker to exploit it using a “time based” approach.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | moodle/moodle | >= 3.5.0, < 3.5.4 | 3.5.4 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2019-6970
- https://cds.thalesgroup.com/en/tcs-cert/CVE-2019-6970
- https://excellium-services.com/cert-xlm-advisory/cve-2019-6970
- https://github.com/moodle/moodle
- https://www.excellium-services.com/cert-xlm-advisory
- https://www.excellium-services.com/cert-xlm-advisory/cve-2019-6970
- CVSS vector
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H- Weakness (CWE)
CWE-918- Platform
- Composer
- Package
moodle/moodle- Disclosed
- 14.05.2022
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-vjxx-54vw-q59f - 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 SSRF Vulnerability this entry
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