UpHeron
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Servers and applications

CVE-2019-3809

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.

Severity
Critical 10.0
Published
25 Mar 2019
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
0.8% in the next 30 daysHigher than 58% of CVEs. EPSS by FIRST, 10 Nov 2026
Weakness
Cross-site request forgery (CWE-352)Server-side request forgery (CWE-918)
Attack
Over the network · No login needed · No user action needed
Attacker can
Read data · Change data · Take it down
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Sources
NVD

Affected software

SoftwareAffected versions
MoodleServers and applications · cpe:a:moodle:moodle
  • From 3.1.0 up to 3.1.15

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2019-3809
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2019-3809