How severe is CVE-2017-20057?

CVE-2017-20057 has a CVSS score of 6.1/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by CVE-2017-20057?

CVE-2017-20057 affects the following packages: elefant/cms (Packagist). Ecosystems affected: Packagist.

How do I fix CVE-2017-20057?

Update elefant/cms to 1.3.13 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2017-20057 is resolved across your whole dependency graph.

How do I detect CVE-2017-20057 in my Packagist dependencies?

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.

How do I mitigate CVE-2017-20057 if there is no patch (or I can't update yet)?

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.

Is CVE-2017-20057 actively exploited in the wild?

No public exploit code has been indexed for CVE-2017-20057 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2017-20057?

CVE-2017-20057 has an EPSS (Exploit Prediction Scoring System) score of 0.6%, placing it in the 49th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2017-20057?

CVE-2017-20057 is classified as CWE-80 (CWE-80), Cross-site Scripting (XSS) (CWE-79). These weakness types describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was CVE-2017-20057 published, and has it been updated?

CVE-2017-20057 was published on June 21, 2022 and was last updated on November 8, 2023. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐘

🐘 Packagist

Not in CISA KEV

MEDIUM severity

CVE-2017-20057 — cms

MEDIUM

CVE-2017-20057 is a medium-severity (CVSS 6.1) CWE-80 vulnerability in elefant/cms. A fix is available for elefant/cms — see the affected versions and patch details below.

Cross site scripting in Elefant CMS

Published

Jun 21, 2022

Updated

Nov 8, 2023

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Nov 11, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2017-20057.

EPSS Exploitation Probability

via FIRST.org ↗

0.6%probability of exploitation in next 30 days

Lower Risk+0.01%

Lower risk than most CVEs49th percentile — riskier than 49% of all scored CVEsHighest risk

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

1 pkg affected

🐘elefant/cms

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

A vulnerability classified as problematic has been found in Elefant CMS 1.3.12-RC. Affected is an unknown function. The manipulation of the argument username leads to basic cross site scripting (Persistent). It is possible to launch the attack remotely. Upgrading to version 1.3.13 is able to address this issue. It is recommended to upgrade the affected component.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐘Packagist	`elefant/cms`	all versions	1.3.13`composer require elefant/cms:^1.3.13`

Affected Products

1 product · 1 configurations

Application

elefant cmselefantcms

1 version

1.3.12

Detection & mitigation playbook

Open-source dependency

Detect
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-2017-20057 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

O3 Security · Impact-Aware SCA

Is CVE-2017-20057 in your dependencies?

Find it across Packagist, including transitive dependencies.

Scan my dependencies How O3 SCA works

CVSS Score

6.1/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Raw vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CWE Classification

CWE-80CWE-80 CWE-79Cross-site Scripting (XSS)

Weaponization

No Nuclei template, Metasploit module or public proof-of-concept found.

Timeline

Disclosed

Jun 21, 2022

Last updated

Nov 8, 2023

Identifiers

CVE-2017-20057

References

Advisorynvd.nist.gov · CVE 2017 20057 Webvuldb.com Webseclists.org Packagegithub.com · elefant

Related vulnerabilities

This CVE is medium severity; 8 of 8 other CVEs affecting elefant/cms are rated as high or higher (top: high).

CVE-2017-20060CVE-2017-20058CVE-2017-20059CVE-2017-20064CVE-2017-20061CVE-2017-20063CVE-2017-20062CVE-2012-1296

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedNov 8, 2023