Cross-site scripting in NukeViet - CVE-2026-49259
Published: July 24, 2026
Vulnerability identifier: #VU139335
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2026-49259
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to execute arbitrary JavaScript in the victim's browser.
The vulnerability exists due to cross-site scripting in the comment reply handler in themes/default/modules/comment/comment.tpl when rendering a comment author's display name inside an inline onclick JavaScript string. A remote user can store a specially crafted JavaScript payload in profile display name fields and post a comment to execute arbitrary JavaScript in the victim's browser.
User interaction is required when a visitor clicks the Reply link on a comment posted by the malicious user.
Affected software
NukeViet
How to mitigate CVE-2026-49259
Install security update from vendor's website.
NukeViet - update to 4.5.09