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CVE-2020-1691

15
FAUCET Score

CVE-2020-1691 is a stored cross-site scripting (XSS) vulnerability affecting Moodle 3.8, where insufficient sanitization of messages could lead to malicious script injection in the conversation overview. With a CVSS score of 5.4 (Medium), this vulnerability requires user interaction and low privileges, but successful exploitation could result in limited impact to confidentiality and integrity. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
3.8.0CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:3.8.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.4MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.3
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.54%
Probability of exploitation in next 30 days
EPSS Percentile
42.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0054 is in the 67th percentile among its peer group of 15,239 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

composerpatch availablevia ghsa
Product: moodle/moodleFixed in: 3.8.1

Vendor Advisories (1)

composerGHSA-cwhp-rqfr-8462medium

Moodle XSS Vulnerability

Aug 6, 2022

References

moodle.org / mod/forum/discuss.php
Issue TrackingPatchVendor Advisory