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CVE-2018-1136

17
FAUCET Score

CVE-2018-1136 describes a cross-site scripting (XSS) vulnerability in Moodle 3.x. An authenticated user can create a malicious HTML block on their personal dashboard and then move it to other pages, exposing other users to the embedded scripts. This vulnerability has a CVSS score of 4.3 (Medium), indicating a network attack vector with low complexity and potential for limited confidentiality impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.1.0, <= 3.1.11CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*
>= 3.2.0, <= 3.2.8CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*
>= 3.3.0, <= 3.3.5CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*
>= 3.4.0, <= 3.4.2CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

4.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
1.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.99%
Probability of exploitation in next 30 days
EPSS Percentile
58.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0099 is in the 72nd percentile among its peer group of 21,977 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

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 (4)

composerpatch availablevia ghsa
Product: moodle/moodleFixed in: 3.1.12
composerpatch availablevia ghsa
Product: moodle/moodleFixed in: 3.2.9
composerpatch availablevia ghsa
Product: moodle/moodleFixed in: 3.3.6
composerpatch availablevia ghsa
Product: moodle/moodleFixed in: 3.4.3

Vendor Advisories (1)

composerGHSA-xhfw-wjjc-4j5hmedium

Moodle Cross-site Scripting

May 13, 2022

References

moodle.org / mod/forum/discuss.php
Vendor Advisory
securityfocus.com / bid/104307
Third Party AdvisoryVDB Entry