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MEDIUM severity

Studio 42 elFinder allows stored XSSGHSA-c3j8-q5x6-2855

MEDIUM

GHSA-c3j8-q5x6-2855 is a medium-severity (CVSS 5.4) Cross-site Scripting (XSS) vulnerability in studio-42/elfinder. 1 public exploit reference exists, so weaponization risk is real. No vendor fix is recorded yet; mitigation options are listed below.

Also known asCVE-2021-45919
Published
Updated
Affected
1 pkg
Patched
See advisory
Exploits
1 known
Exploitation data as of Oct 13, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.6%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs49th percentile — riskier than 49% of all scored CVEsHighest risk
0.00%0.38%0.75%1.13%0.3%0.6%Apr 26Aug 26Oct 26

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

How urgent is this, really

GHSA-c3j8-q5x6-2855 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,987 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

1 pkg affected
🐘studio-42/elfinder

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

Studio 42 elFinder through 2.1.31 allows XSS via an SVG document.

Affected Packages

1 total
EcosystemPackageVulnerable rangeFix
🐘Packagiststudio-42/elfinderall versionsNo fix

Affected Products

1 product · 1 configurations
Application
elfinderstd42
≤ 2.1.31
range
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

Studio 42 elFinder through 2.1.31 allows XSS via an SVG document.

trustwave.comNVDFeb 2022

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for studio-42/elfinder, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Remediation status

    No patched version of studio-42/elfinder has shipped for GHSA-c3j8-q5x6-2855 yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.

  3. Mitigate without a patch

    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

Studio 42 elFinder through 2.1.31 allows XSS via an SVG document.
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Studio 42 elFinder allows stored XSS (Medium 5.4)