# Media Library Assistant <= 3.43 - Authenticated (Author+) PHP Object Injection

- **ID:** WPSEC-2026-1982
- **Plugin:** Media Library Assistant (`media-library-assistant`), https://wordpress.org/plugins/media-library-assistant/
- **Affected versions:** all versions before 3.44
- **Fixed in:** 3.44 (Update to 3.44 or later.)
- **Severity:** High 7.5 (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H)
- **Weakness:** CWE-502
- **Usage among sites WPSec scans:** plugin Low, affected versions None seen (as of 2026-10-29)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/media-library-assistant
- **Fix released:** 2026-10-28
- **Published:** 2026-10-30
- **URL:** https://wpsec.com/vuln/WPSEC-2026-1982/

## Description

The Media Library Assistant plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 3.43, due to post meta values that get_metadata() has already unserialized being passed through maybe_unserialize() a second time. This happens for the 'alt_text' data source, which is used by shortcode field-level substitution parameters and by mapping rules, and for hidden meta fields during mapping. WordPress stores a serialized-looking string such as attachment alt text serialized a second time, so the string comes back intact and is then unserialized. This makes it possible for authenticated attackers with author-level access and above, who can set the alt text of their own attachments, to inject a PHP object. No known POP chain is present in the plugin itself. If a POP chain is present via an additional plugin or theme, the attacker may be able to delete arbitrary files, retrieve sensitive data, or execute code.

## References

- https://wpsec.com/vuln/WPSEC-2026-1982/
- https://plugins.svn.wordpress.org/media-library-assistant/tags/3.44/
- https://wordpress.org/plugins/media-library-assistant/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-1982/

License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Free to use, share and adapt, also commercially, if you credit WPSec and link to this advisory.