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CVE-2018-1081

19
FAUCET Score

CVE-2018-1081 describes a medium-severity vulnerability affecting multiple versions of Moodle, specifically 3.4 to 3.4.1, 3.3 to 3.3.4, 3.2 to 3.2.7, and 3.1 to 3.1.10. The flaw allows unauthenticated users to trigger custom messages to the administrator via the PayPal enrolment script, potentially leading to email spamming if the request origin is not properly verified. With a CVSS score of 5.3, this vulnerability has a low attack complexity and requires no user interaction or privileges, but its impact is limited to integrity (L) and availability (N). There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.0.10CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*
>= 3.1, <= 3.1.10CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*
>= 3.2, <= 3.2.7CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*
>= 3.3, <= 3.3.4CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*
>= 3.4.0, <= 3.4.1CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.47%
Probability of exploitation in next 30 days
EPSS Percentile
71.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0147 is in the 53rd percentile among its peer group of 23,725 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 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: 3.1.11
composerpatch availablevia ghsa
Product: moodle/moodleFixed in: 3.2.8
composerpatch availablevia ghsa
Product: moodle/moodleFixed in: 3.3.5
composerpatch availablevia ghsa
Product: moodle/moodleFixed in: 3.4.2

Vendor Advisories (1)

composerGHSA-v9xq-vh72-chr4medium

Moodle Unauthenticated users can trigger custom messages to admin via paypal enrol script

May 13, 2022

References

git.moodle.org / gw
PatchVendor Advisory
moodle.org / mod/forum/discuss.php
Vendor Advisory
securityfocus.com / bid/103728
Third Party AdvisoryVDB Entry