Your RSA-2048 keys break in 2030. Find every one of them before attackers do.
🐘
🐘 Packagist
Not in CISA KEV
MEDIUM severity

CVE-2018-10125 — contao

MEDIUM

CVE-2018-10125 is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in contao/contao. A fix is available for contao/contao — see the affected versions and patch details below.

Cross-site Scripting in Contao

Also known asGHSA-pj4j-287j-f742
Published
Updated
Affected
6 pkgs
Patched
6 / 6
Exploits
None indexed
Exploitation data as of Oct 7, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.8%probability of exploitation in next 30 days
Lower Risk+0.01%
Lower risk than most CVEs57th percentile — riskier than 57% of all scored CVEsHighest risk
0.00%0.45%0.89%1.34%0.3%0.8%0.8%0.8%0.8%Jun 26Aug 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2018-10125 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,738 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

6 pkgs affected
🐘contao/contao🐘contao/contao🐘contao/core-bundle🐘contao/core-bundle🐘contao/core🐘contao/core-bundle

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

Contao before 4.5.7 has XSS in the system log.

Affected Packages

6 total 6 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistcontao/contao≥ 4.0.0&&< 4.4.184.4.18composer require contao/contao:^4.4.18
🐘Packagistcontao/contao≥ 4.5.0&&< 4.5.84.5.8composer require contao/contao:^4.5.8
🐘Packagistcontao/core-bundle≥ 4.0.0&&< 4.4.184.4.18composer require contao/core-bundle:^4.4.18
🐘Packagistcontao/core-bundle≥ 4.5.0&&< 4.5.84.5.8composer require contao/core-bundle:^4.5.8
🐘Packagistcontao/core≥ 3.0.0&&< 3.5.353.5.35composer require contao/core:^3.5.35
🐘Packagistcontao/core-bundle≥ 3.0.0&&< 3.5.353.5.35composer require contao/core-bundle:^3.5.35

Affected Products

1 product · 7 configurations
Application
contaocontao
≥ 4.5.0 && ≤ 4.5.6
4 versions
4.0.04.1.04.2.04.3.0

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for contao/contao, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update contao/contao to 4.4.18 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2018-10125 is resolved across your whole dependency graph.

  3. Workarounds

    Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Frequently Asked Questions

Contao before 4.5.7 has XSS in the system log.
O3 Security · Impact-Aware SCA

Is CVE-2018-10125 in your dependencies?

Find it across Packagist, including transitive dependencies.

Scan my dependencies How O3 SCA works
CVE-2018-10125: contao XSS — Fixed in 4.4.18