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

CVE-2021-41086 — jsuites

MEDIUMFix: jsuites/jsuites@d47a6f4

CVE-2021-41086 is a medium-severity (CVSS 5.4) Cross-site Scripting (XSS) vulnerability in jsuites. A fix is available for jsuites — see the affected versions and patch details below.

Clipboard-based XSS

Also known asGHSA-qh7x-j4v8-qw5w
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Oct 3, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.9%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs59th percentile — riskier than 59% of all scored CVEsHighest risk
0.14%0.60%1.06%1.53%0.6%1.0%0.9%0.9%0.9%Apr 26Aug 26Oct 26

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

How urgent is this, really

CVE-2021-41086 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.

60other npm packages depend on this — each one inherits the vulnerability until it's patched upstream
jsuitesnpm
127Kdownloads / week

Description

jsuites is an open source collection of common required javascript web components. In affected versions users are subject to cross site scripting (XSS) attacks via clipboard content. jsuites is vulnerable to DOM based XSS if the user can be tricked into copying anything from a malicious and pasting it into the html editor. This is because a part of the clipboard content is directly written to innerHTML allowing for javascript injection and thus XSS. Users are advised to update to version 4.9.11 to resolve.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
📦npmjsuitesall versions4.9.11npm install jsuites@4.9.11

Affected Products

1 product · 1 configurations
Application
jsuitesjsuites
< 4.9.11
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

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

  2. Fix

    Update jsuites to 4.9.11 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-41086 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

jsuites is an open source collection of common required javascript web components. In affected versions users are subject to cross site scripting (XSS) attacks via clipboard content. jsuites is vulnerable to DOM based XSS if the user can be tricked into copying _anything_ from a malicious and pasting it into the html editor. This is because a part of the clipboard content is directly written to `innerHTML` allowing for javascript injection and thus XSS. Users are advised to update to version 4.9.11 to resolve.
O3 Security · Impact-Aware SCA

Is CVE-2021-41086 in your dependencies?

Find it across npm, including transitive dependencies.

Scan my dependencies How O3 SCA works
CVE-2021-41086: jsuites XSS — Fixed in 4.9.11