CVE-2026-81571

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

MEDIUM

4.8

CVSS Score

Published: September 2, 2026 at 02:16 PM UTC

Updated: September 3, 2026 at 06:04 PM UTC

1 product affected across 1 vendorBrave Popup Builder

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Severity

MEDIUM4.8

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Brave Popup Builder · Bravepopupwordpress-plugin

60%

v < 0.8.8

Affected range stops below 0.8.8, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

ExploitVDB EntryTechnical Description

Source: cverecord

https://wpscan.com/vulnerability/049d0bfc-962b-4f5b-a089-c45f4ad981e3/

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.8MEDIUMWPScan

Vector?

Quick Info

StatusDEFERRED

CWE

CWE-74

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