CVE-2019-3809: moodle Cross-Site Request Forgery (CSRF)
CVSS: 10.0v3.0CriticalModified
AliasesUBUNTU-CVE-2019-3809USN-8805-1
Published 25-03-2019Last modified 04-08-2024
Vulnerability summary
CVE-2019-3809 is a critical (CVSS 10.0) Cross-Site Request Forgery (CSRF) vulnerability in moodle. EPSS estimates a 0.84% chance of exploitation in the next 30 days, higher than 57% of scored vulnerabilities.
CVSS score
10.0/10
010
Critical · v3.0 (NVD)EPSS score
0.84%
0%100%
Low · -0.02 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 25-03-2019PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
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 metrics
4 scores · 3 sources · 2 versionsCritical 10.0Preferred score · NVD (NIST)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:HSources3 sources · 6.5–10.0
- CVE.orgCNA6.5MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:LDiffers
- OSV · UbuntuEcosystem advisory · calculated10.0CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
High 7.5Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
0.84%
Chance of exploitation in the next 30 days
Percentile
57%
Versus all other CVEs
30-day change
-0.02 pp
From 0.86% on 19-09-2026
19-09-202619-10-2026
EPSS score0.84%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-352Cross-Site Request Forgery (CSRF)The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor.
- CWE-918Server-Side Request Forgery (SSRF)The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.
Affected systems
[unknown]1 product
- moodle3.1.16
Moodle1 product
- moodle≥ 3.1.0, ≤ 3.1.15
Ubuntu1 product
- moodle< 3.0.3+dfsg-0ubuntu1+esm1
3 vendors · 3 products
References
6 links- bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3809X Refsource CONFIRMIssue TrackingPatchThird Party Advisory
- git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-64222X Refsource CONFIRMREPORTPatchVendor Advisory