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MEDIUM severity

leanote vulnerable to cross-site scriptingGHSA-6cmv-2548-82v4

MEDIUMFix: leanote/leanote@0f9733c

GHSA-6cmv-2548-82v4 is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in github.com/leanote/leanote. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

Also known asCVE-2021-4263
Published
Updated
Affected
1 pkg
Patched
See advisory
Exploits
None indexed
Exploitation data as of Nov 7, 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 GHSA-6cmv-2548-82v4.

EPSS Exploitation Probability

via FIRST.org ↗
0.6%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs47th percentile — riskier than 47% of all scored CVEsHighest risk
0.00%0.35%0.71%1.06%0.2%0.6%May 26Sep 26Nov 26

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
🐹github.com/leanote/leanote

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.

Description

A vulnerability, which was classified as problematic, has been found in leanote. This issue affects the function define of the file public/js/plugins/history.js. The manipulation of the argument content leads to cross site scripting. The attack may be initiated remotely. The name of the patch is https:/github.com/leanote/leanote/commit/0f9733c890077942150696dcc6d2b1482b7a0a19. It is recommended to apply a patch to fix this issue. The identifier VDB-216461 was assigned to this vulnerability.

Affected Packages

1 total
EcosystemPackageVulnerable rangeFix
🐹Gogithub.com/leanote/leanoteall versionsNo fix

Affected Products

1 product · 1 configurations
Application
leanoteleanote
1 version
2.6.1

Detection & mitigation playbook

Open-source dependency

  1. Detect

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

  2. Remediation status

    The records we use list no patched version of github.com/leanote/leanote for GHSA-6cmv-2548-82v4. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.

  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

A vulnerability, which was classified as problematic, has been found in leanote. This issue affects the function define of the file `public/js/plugins/history.js`. The manipulation of the argument content leads to cross site scripting. The attack may be initiated remotely. The name of the patch is https:/github.com/leanote/leanote/commit/0f9733c890077942150696dcc6d2b1482b7a0a19. It is recommended to apply a patch to fix this issue. The identifier VDB-216461 was assigned to this vulnerability.
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GHSA-6cmv-2548-82v4: leanote XSS (Medium 6.1)