What’s Vulnerable › Vulnerabilities

CVE-2024-40643: Joplin has a parsing error leading to Cross-site Scripting (XSS)

• Severity: critical (CVSS 9.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2024-09-09 · updated 2026-06-17
• Weakness: CWE-79

Description

Joplin is a free, open source note taking and to-do application. Joplin fails to take into account that "<" followed by a non letter character will not be considered html. As such it is possible to do an XSS by putting an "illegal" tag within a tag.

Affected products

• laurent22 joplin: before 3.0.15 — fixed in 3.0.15

How to fix

Upgrade to a fixed version: laurent22 joplin 3.0.15. Check the vendor advisory for mitigations.

References

• https://github.com/laurent22/joplin/commit/b220413a9b5ed55fb1f565ac786a5c231da8bc87
• https://github.com/laurent22/joplin/security/advisories/GHSA-g796-3g6g-jmmc

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