CVE-2017-20058 — cms
MEDIUMCVE-2017-20058 is a medium-severity (CVSS 6.1) CWE-80 vulnerability in elefant/cms. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for elefant/cms — see the affected versions and patch details below.
Cross site scripting in Elefant CMS
Exploitation Status
Proof-of-concept exploit code exists
- CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.
Exploitation and automatability from CISA’s SSVC triage for CVE-2017-20058.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
elefant/cmsReal-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
A vulnerability classified as problematic was found in Elefant CMS 1.3.12-RC. Affected by this vulnerability is an unknown functionality of the component Version Comparison. The manipulation leads to basic cross site scripting (Persistent). The attack can be launched remotely. Upgrading to version 1.3.13 is able to address this issue. It is recommended to upgrade the affected component.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | elefant/cms | all versions | 1.3.13composer require elefant/cms:^1.3.13 |
Affected Products
elefantcmselefantcmsResearch use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for elefant/cms, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update elefant/cms to 1.3.13 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2017-20058 is resolved across your whole dependency graph.
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
Is CVE-2017-20058 in your dependencies?
Find it across Packagist, including transitive dependencies.