CVE-2025-51691

Description

Cross-Site Scripting (XSS) vulnerability found in MarkTwo commit e3a1d3f90cce4ea9c26efcbbf3a1cbfb9dcdb298 (May 2025) allows a remote attacker to execute arbitrary code via a crafted script input to the editor interface. The application does not properly sanitize user-supplied Markdown before rendering it. Successful exploitation could lead to session hijacking, credential theft, or arbitrary client-side code execution in the context of the victim's browser.

Category

6.1
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.04%
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://marktwo.app/try-it-now
https://github.com/anthonygarvan/marktwo
https://github.com/0x72303074/CVE-Disclosures/tree/main/MarkTwo%20Markdown%20Editor/CVE-2025-51691

Frequently Asked Questions

What is the severity of CVE-2025-51691?
CVE-2025-51691 has been scored as a medium severity vulnerability.
How to fix CVE-2025-51691?
To fix CVE-2025-51691, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-51691 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-51691 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.