CVE-2026-81571CWE-74

CVE-2026-81571

Medium · published September 2, 2026

CVSS v3.1
4.8
EPSS
0%
Percentile
14.6
In the wild
Unconfirmed
What it is

The Brave WordPress plugin before 0.8.8 does not prevent a URL parameter used to pre-fill a form field from being passed to WordPress's shortcode engine, allowing unauthenticated attackers to have arbitrary shortcodes registered on the site executed server-side.

The record
Technical detail
CVSS v3.1
4.8 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00243 · 14.6th percentile
Weakness
CWE-74 · Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
Published
2026-09-02T19:17Z
References (1)
https://wpscan.com/vulnerability/049d0bfc-962b-4f5b-a089-c45f4ad981e3/ · [email protected]
EPSS history
Timeline
  • 04 SEP 03:44Z
    EPSS moved — → 0%
    epss
  • 02 SEP 14:16Z
    Brave Popup Builder < 0.8.8 - Unauthenticated Arbitrary Shortcode Execution via UTM Parameter
    cvelistv5