What’s Vulnerable › Vulnerabilities

CVE-2018-5478

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-09-21 · updated 2026-06-17
• Weakness: CWE-79

Description

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

Affected products

• contao: from 3.0.0 before 3.5.32 — fixed in 3.5.32

How to fix

Upgrade to a fixed version: contao 3.5.32. Check the vendor advisory for mitigations.

References

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

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