VulnerabilityAnalyzed

CVE-2025-63785

A DOM-based Cross-Site Scripting (XSS) vulnerability exists in the text editor feature of the Onlook web application 0.2.32.

MEDIUM 6.1EPSS 0.27%

Does this matter?

Lower severity and a low EPSS score (0.27%). Track it; it rarely justifies an emergency change on its own.

Description

A DOM-based Cross-Site Scripting (XSS) vulnerability exists in the text editor feature of the Onlook web application 0.2.32. This vulnerability occurs because user-supplied input is not properly sanitized before being directly injected into the DOM via innerHTML when editing a text element. An attacker can exploit this to inject malicious HTML and script code, which is then executed within the context of the preview iframe, allowing for the execution of arbitrary scripts in the user's session.

CVSS 3.1: 6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS: 0.27% probability · 19th percentile
CISA KEV: Not listed
Weakness: CWE-20, CWE-79, CWE-116
Affected: onlook/onlook
Source: cve@mitre.org

References

https://blog.soohyun.tech/CVE-2025-63785-DOM-XSS-in-Onlook-27e557175d2e80e1b210c75b77952115Exploit, Third Party Advisory
https://tossbank.notion.site/DOM-XSS-in-onlook-27e557175d2e80e1b210c75b77952115Broken Link

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.