CVE-2018-1081

Name: CVE-2018-1081
Creator: NVD / NIST
Published: 2018-04-04T21:29:00.213+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 1.47%

Last modified Jun 17, 2026

CVE-2018-1081 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. A flaw was found in Moodle 3.4 to 3.4.1, 3.3 to 3.3.4, 3.2 to 3.2.7, 3.1 to 3.1.10 and earlier unsupported versions. Unauthenticated users can trigger custom messages to admin via paypal enrol script. EPSS estimates a 1.47% chance of exploitation in the next 30 days.

Description

A flaw was found in Moodle 3.4 to 3.4.1, 3.3 to 3.3.4, 3.2 to 3.2.7, 3.1 to 3.1.10 and earlier unsupported versions. Unauthenticated users can trigger custom messages to admin via paypal enrol script. Paypal IPN callback script should only send error emails to admin after request origin was verified, otherwise admin email can be spammed.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

1.47%

70.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Moodle	Moodle	<= 3.0.10
Moodle	Moodle	>= 3.1, <= 3.1.10
Moodle	Moodle	>= 3.2, <= 3.2.7
Moodle	Moodle	>= 3.3, <= 3.3.4
Moodle	Moodle	>= 3.4.0, <= 3.4.1

References

http://www.securityfocus.com/bid/103728Third Party Advisory, VDB Entry
https://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-61392Patch, Vendor Advisory
https://moodle.org/mod/forum/discuss.php?d=367938Vendor Advisory
http://www.securityfocus.com/bid/103728Third Party Advisory, VDB Entry
https://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-61392Patch, Vendor Advisory
https://moodle.org/mod/forum/discuss.php?d=367938Vendor Advisory

Timeline

Published: Apr 4, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-1081?

How severe is CVE-2018-1081?

CVE-2018-1081 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 1.47% probability of exploitation in the next 30 days.

How do I fix CVE-2018-1081?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-1081?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST