CVE-2018-5478

Name: CVE-2018-5478
Creator: NVD / NIST
Published: 2023-09-21T06:15:12.223+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.41%

Last modified Jun 17, 2026

CVE-2018-5478 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. Contao 3.x before 3.5.32 allows XSS via the unsubscribe module in the frontend newsletter extension.. EPSS estimates a 0.41% chance of exploitation in the next 30 days.

Description

Contao 3.x before 3.5.32 allows XSS via the unsubscribe module in the frontend newsletter extension.

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

0.41%

32.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Contao	Contao	>= 3.0.0, < 3.5.32

References

https://github.com/FriendsOfPHP/security-advisories/blob/master/contao/core/CVE-2018-5478.yamlThird Party Advisory
https://security.snyk.io/vuln/SNYK-PHP-CONTAOCORE-70397Third Party Advisory
https://github.com/FriendsOfPHP/security-advisories/blob/master/contao/core/CVE-2018-5478.yamlThird Party Advisory
https://security.snyk.io/vuln/SNYK-PHP-CONTAOCORE-70397Third Party Advisory

Timeline

Published: Sep 21, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-5478?

Contao 3.x before 3.5.32 allows XSS via the unsubscribe module in the frontend newsletter extension.

How severe is CVE-2018-5478?

CVE-2018-5478 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.41% probability of exploitation in the next 30 days.

How do I fix CVE-2018-5478?

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-2018-5478?

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

Scan your code now

Source: NVD / NIST