CVE-2019-3809
The mybackpack functionality allowed setting the URL of badges, when it should be restricted to the Mozilla Open Badges backpack URL.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.84%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
A flaw was found in Moodle versions 3.1 to 3.1.15 and earlier unsupported versions. The mybackpack functionality allowed setting the URL of badges, when it should be restricted to the Mozilla Open Badges backpack URL. This resulted in the possibility of blind SSRF via requests made by the page.
- CVSS 3.0
- 10.0 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- EPSS
- 0.84% probability · 58th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-352, CWE-918
- Affected
- moodle/moodle
- Source
- secalert@redhat.com
EPSS 0.8% 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
- http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-64222Patch, Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3809Issue Tracking, Patch, Third Party Advisory
- https://moodle.org/mod/forum/discuss.php?d=381229#p1536766Patch, Vendor Advisory
- http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-64222Patch, Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3809Issue Tracking, Patch, Third Party Advisory
- https://moodle.org/mod/forum/discuss.php?d=381229#p1536766Patch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.