CVE-2026-3534

Summary

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.

Affected Software

Weaknesses

• CWE-79: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

References

• https://www.wordfence.com/threat-intel/vulnerabilities/id/acf2906b-1ee5-4272-bf6d-36a02023f658?source=cve
• https://themes.trac.wordpress.org/browser/astra/4.12.3/inc/core/common-functions.php#L1640
• https://themes.trac.wordpress.org/browser/astra/4.12.3/inc/core/common-functions.php#L1629
• https://themes.trac.wordpress.org/browser/astra/4.12.3/inc/metabox/class-astra-meta-boxes.php#L1386
• https://themes.trac.wordpress.org/browser/astra/4.12.3/inc/metabox/class-astra-meta-boxes.php#L1380
• https://themes.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=316958%40astra%2F4.12.4&old=312219%40astra%2F4.12.3

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