Vulnerability · Published Sep 2, 2026 · Assigned by WPScan

CVE-2026-81571Brave Popup Builder < 0.8.8 - Unauthenticated Arbitrary Shortcode Execution via UTM Parameter

Medium 4.8

In plain English

A medium-severity injection in Brave from Unknown. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 16% of all known vulnerabilities).

Severity (CVSS 3.1)4.8Medium

Exploit odds (30 days)0.2%top 84.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
Unknown	Brave	0 – before 0.8.8

Weakness: CWE-74 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

References

https://wpscan.com/vulnerability/049d0bfc-962b-4f5b-a089-c45f4ad981e3/ exploit, vdb-entry, technical-description