Main Vulnerability Database Vulnerabilities #VU120976

Stored cross-site scripting in vega - CVE-2025-66648

Published: January 6, 2026

Vulnerability identifier: #VU120976

CSH Severity: Low

CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]

CVE-ID: CVE-2025-66648

CWE-ID: CWE-79

Exploitation vector: Remote access

Exploit availability: Public exploit is available

Vulnerability details

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 the "setdata" function. A remote attacker can inject 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.

Affected software

vega
MongoDB Enterprise Advanced with IBM

How to mitigate CVE-2025-66648

Install updates from vendor's website.

vega - update to 6.1.1
MongoDB Enterprise Advanced with IBM - update to 1.16.0

Links to Public Exploits and PoC-codes

Exploit #12254 - XSS in `vega-functions` via `setdata` function (January 6, 2026)

External References

https://github.com/vega/vega/security/advisories/GHSA-m9rg-mr6g-75gm