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CVE-2017-2645

22
FAUCET Score

CVE-2017-2645 describes a Cross-Site Scripting (XSS) vulnerability in Moodle 3.x, specifically exploitable through attachments to evidence of prior learning. With a CVSS score of 6.1 (Medium), this vulnerability requires user interaction (UI:R) and can lead to partial compromise of confidentiality and integrity (C:L, I:L). There is no evidence of active exploitation, and no public exploit code is available in Metasploit, Nuclei, or ExploitDB. Despite this, the vulnerability has garnered some community discussion and media coverage, indicating awareness within the security community.

Impacted Technologies

VendorProductVersion(s)CPE
3.1.0CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:3.1.0:*:*:*:*:*:*:*
3.1.0CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:3.1.0:beta:*:*:*:*:*:*
3.1.0CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:3.1.0:rc1:*:*:*:*:*:*
3.1.0CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:3.1.0:rc2:*:*:*:*:*:*
3.1.1CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:3.1.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.1MEDIUM

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.05%
Probability of exploitation in next 30 days
EPSS Percentile
60.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0105 is in the 73rd percentile among its peer group of 26,234 CVEs.

Social Chatter

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

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

composerpatch availablevia ghsa
Product: moodle/moodleFixed in: 3.1.5
composerpatch availablevia ghsa
Product: moodle/moodleFixed in: 3.2.2

Vendor Advisories (1)

composerGHSA-9cg4-4f87-jhm3medium

Moodle XSS in attachments to evidence of prior learning

May 17, 2022

References

moodle.org / mod/forum/discuss.php
PatchThird Party Advisory
securityfocus.com / bid/96982
Third Party AdvisoryVDB Entry
securitytracker.com / id/1038174