Cross-site scripting in Joplin

1) Cross-site scripting

EUVDB-ID: #VU103727

Risk: Low

CVSSv4.0: 2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P/U:Clear]

CVE-ID: CVE-2025-24028

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: Yes

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data in Rich Text Editor. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Joplin: 3.2.6 - 3.2.11

CPE2.3

• cpe:2.3:a:joplinapp:joplin:3.2.6:*:*:*:*:*:*:*
• cpe:2.3:a:joplinapp:joplin:3.2.7:*:*:*:*:*:*:*
• cpe:2.3:a:joplinapp:joplin:3.2.8:*:*:*:*:*:*:*

External links

https://github.com/laurent22/joplin/commit/2a058ed8097c2502e152b26394dc1917897f5817
https://github.com/laurent22/joplin/commit/9b505395918bc923f34fe6f3b960bb10e8cf234e
https://github.com/laurent22/joplin/security/advisories/GHSA-5w3c-wph9-hq92
https://joplinapp.org/help/dev/spec/note_viewer_isolation

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to open a a specially crafted archive.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.