GHSA-mpg7-2rx9-h5qp · Severity: medium · Ecosystem: composer — Contao Cross-site Scripting vulnerabililty
Contao 3.x before 3.5.32 allows XSS via the unsubscribe module in the frontend newsletter extension.
Conclusion & alert: CVE-2018-5478 is rated Low Risk (36.1/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.41%). Mandatory action: Monitor for updates and reassess as exploit intelligence or EPSS changes.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.08% | 0.41% | +0.33% |
| 2 | 2025-11-21 | 0.21% | 0.08% | -0.14% |
| 3 | 2025-11-18 | — | 0.21% | — |
Full EPSS history (5 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 6.1 | 3.1 | MEDIUM |
|
2.8 | 2.7 | [email protected] |
GHSA-mpg7-2rx9-h5qp · Severity: medium · Ecosystem: composer — Contao Cross-site Scripting vulnerabililty
| URL | Tags |
|---|---|
| https://github.com/FriendsOfPHP/security-advisories/blob/master/contao/core/CVE-2018-5478.yaml | Third Party Advisory |
| https://security.snyk.io/vuln/SNYK-PHP-CONTAOCORE-70397 | Third Party Advisory |