XSS in Brainstormforce Astra
CVE-2026-3534
The Astra theme for WordPress is vulnerable to Stored Cross-Site Scripting via the `ast-page-background-meta` and `ast-content-background-meta` post meta fields in all versions up to, and including, 4.12.3. This is due to insufficient inpu…
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.001 (17.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.
Affected products
- Brainstormforce Astra — versions 0
Weakness classification (CWE)
References
- www.wordfence.com/threat-intel/vulnerabilities/id/acf2906b-1ee5-4272-bf6d-36a02…
- themes.trac.wordpress.org/browser/astra/4.12.3/inc/core/common-functions.php
- themes.trac.wordpress.org/browser/astra/4.12.3/inc/core/common-functions.php
- themes.trac.wordpress.org/browser/astra/4.12.3/inc/metabox/class-astra-meta-box…
- themes.trac.wordpress.org/browser/astra/4.12.3/inc/metabox/class-astra-meta-box…
- themes.trac.wordpress.org/changeset
Frequently asked questions
- What is CVE-2026-3534?
- CVE-2026-3534 is a medium-severity vulnerability in Brainstormforce Astra, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-03-11.
- How severe is CVE-2026-3534?
- Medium severity. CVSS v3 base score is 6.4 out of 10.