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MEDIUM severity

Cross-site Scripting in JoplinGHSA-6r7x-hc8m-985r

MEDIUMFix: laurent22/joplin@3db47b5

GHSA-6r7x-hc8m-985r is a medium-severity (CVSS 5.4) Cross-site Scripting (XSS) vulnerability in joplin. 4 public exploit references exist, so weaponization risk is real. A fix is available for joplin — see the affected versions and patch details below.

Also known asCVE-2020-9038
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
4 known
Exploitation data as of Oct 12, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
3.6%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs89th percentile — riskier than 89% of all scored CVEsHighest risk
0.70%1.88%3.05%4.23%1.4%3.6%Apr 26Aug 26Oct 26

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

How urgent is this, really

GHSA-6r7x-hc8m-985r 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

1 pkg affected

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.

3other npm packages depend on this — each one inherits the vulnerability until it's patched upstream
joplinnpm
1Kdownloads / week

Description

Joplin through 1.0.184 allows Arbitrary File Read via Cross-site Scripting (XSS).

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
📦npmjoplinall versions1.2.1npm install joplin@1.2.1

Affected Products

1 product · 1 configurations
Application
joplinjoplin_project
≤ 1.0.184
range
Exploits & PoCs
4

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

EDB-48147webappsmultiple

Joplin Desktop 1.0.184 - Cross-Site Scripting

by Javier Olmedo · Mar 2, 2020

Exploit-DB Source

Detection & mitigation playbook

Open-source dependency

  1. Detect

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

  2. Fix

    Update joplin to 1.2.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-6r7x-hc8m-985r 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

Joplin through 1.0.184 allows Arbitrary File Read via Cross-site Scripting (XSS).
O3 Security · Impact-Aware SCA

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Cross-site Scripting in Joplin (Medium 5.4)