# Slider by 10Web – Responsive Image Slider <= 1.2.62 - Authenticated (Contributor+) PHP Object Injection via 'two_page_speed' Post Meta

- **ID:** WPSEC-2026-0498
- **Plugin:** Slider by 10Web – Responsive Image Slider (`slider-wd`), https://wordpress.org/plugins/slider-wd/
- **Affected versions:** from 1.2.54 before 1.2.63
- **Fixed in:** 1.2.63 (Update to 1.2.63 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 Medium, affected versions Medium (as of 2026-10-07)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/slider-wd
- **Fix released:** 2026-10-06
- **Published:** 2026-10-07
- **URL:** https://wpsec.com/vuln/WPSEC-2026-0498/

## Description

The Slider by 10Web – Responsive Image Slider plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 1.2.62 via deserialization of the 'two_page_speed' post meta value. The meta key is not protected, so any user who can edit a post can set it as a custom field. The plugin's admin bar notification code, which runs whenever the admin bar is shown to a logged-in user, reads the raw stored value of this meta for every post and passes it to unserialize() without class restrictions. This makes it possible for authenticated attackers, with contributor-level access and above, to inject a PHP Object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions such as delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present.

## References

- https://wpsec.com/vuln/WPSEC-2026-0498/
- https://plugins.svn.wordpress.org/slider-wd/tags/1.2.63/
- https://wordpress.org/plugins/slider-wd/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-0498/

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.