Vulnerability Description
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 input sanitization on meta registration and missing output escaping in the `astra_get_responsive_background_obj()` function for four CSS-context sub-properties (`background-color`, `background-image`, `overlay-color`, `overlay-gradient`). This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://themes.trac.wordpress.org/browser/astra/4.12.3/inc/core/common-functions
- https://themes.trac.wordpress.org/browser/astra/4.12.3/inc/core/common-functions
- https://themes.trac.wordpress.org/browser/astra/4.12.3/inc/metabox/class-astra-m
- https://themes.trac.wordpress.org/browser/astra/4.12.3/inc/metabox/class-astra-m
- https://themes.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=
- https://www.wordfence.com/threat-intel/vulnerabilities/id/acf2906b-1ee5-4272-bf6
FAQ
What is CVE-2026-3534?
CVE-2026-3534 is a vulnerability with a CVSS score of 6.4 (MEDIUM). 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...
How severe is CVE-2026-3534?
CVE-2026-3534 has been rated MEDIUM with a CVSS base score of 6.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-3534?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.