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

CVE-2018-5478

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

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

MEDIUM · CVSS 6.1 EPSS 0.00076
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
▤

Affected Products & Versions

1
contao>= 3.0.0 and < 3.5.32
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
Packagist contao/core MEDIUM fixed in 3.5.32
▣

Scoring & Timeline

6.1
MEDIUM · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD21 Sep 2023 · 06:15 AM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
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
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