CVE-2026-84899CWE-79cross-site-scripting

CVE-2026-84899

Medium · published September 5, 2026

CVSS v3.1
6.8
EPSS
0%
Percentile
36.3
In the wild
Unconfirmed
What it is

The VikWidgetsLoader WordPress plugin before 1.12.0 does not sanitise or escape a block attribute before outputting it inside an inline script, allowing users with the Contributor role to store arbitrary JavaScript that executes in the browser of any user viewing the affected post, including the administrator who reviews the pending submission.

The record
Technical detail
CVSS v3.1
6.8 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00431 · 36.3th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-09-05T11:17Z
References (1)
https://wpscan.com/vulnerability/4e0beb72-d73b-4802-894d-141aadbd8d4f/ · [email protected]
EPSS history
Timeline
  • 06 SEP 03:33Z
    EPSS moved — → 0%
    epss
  • 05 SEP 06:00Z
    VikWidgetsLoader < 1.12.0 - Contributor+ Stored XSS via Gutenberg Block class_suffix
    cvelistv5