Blocks Animation <= 3.2.10 - Authenticated (Contributor+) CSS Injection via Custom Animation Delay and Speed Values
- ID
- WPSEC-2026-3137
- Plugin
- Blocks Animation: CSS Animations for Gutenberg Blocks (blocks-animation)
- Affected
- from 2.5.0 before 3.2.11
- Remediation
- Update to 3.2.11 or later.
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
- Weakness
- CWE-74
- Usage
- Plugin Medium · Affected versions Medium among sites WPSec scans, 2026-11-14
- Attack surface
- Blocks Animation on WPSec AttackSurface
- Fix released
- Published
Description
The Blocks Animation plugin for WordPress is vulnerable to CSS Injection via the custom animation delay and speed values in versions 2.5.0 up to, and including, 3.2.10. This is due to the front-end script reading the 'o-anim-value-delay-' and 'o-anim-value-speed-' class names of animated blocks and writing the remaining value, without validation, into a page-wide style element. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary CSS rules into pages that render the block, for example to hide or restyle page content, overlay the page with attacker-controlled links, or make visitors' browsers load external resources. It does not allow script execution.
References
- https://wpsec.com/vuln/WPSEC-2026-3137/
- https://plugins.svn.wordpress.org/blocks-animation/tags/3.2.11/
- https://wordpress.org/plugins/blocks-animation/
Published by WPSec. Provided as is, without warranty. Corrections: contact us.
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