CVE-2024-4268

Description

The Ultimate Blocks – WordPress Blocks Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's blocks in all versions up to, and including, 3.1.9 due to insufficient input sanitization and output escaping on user supplied attributes. 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.

References

https://www.wordfence.com/threat-intel/vulnerabilities/id/00b60b53-77bf-4640-bf2b-84e011014623?source=cve

https://www.dropbox.com/scl/fi/zh7t1qsvxkxk2dfhwd7nn/Ultimate-Blocks-Stored-XSS_POC_4.20.24.mov?rlkey=ws16dcu7f6mjd3h9emsqev7jm&e=2&st=fdr7q9h7&dl=0

https://wordpress.org/plugins/ultimate-blocks/#developers

https://plugins.trac.wordpress.org/changeset/3108401/

https://plugins.trac.wordpress.org/changeset/3075315/ultimate-blocks

https://plugins.trac.wordpress.org/browser/ultimate-blocks/trunk/src/extensions/custom-css/class-custom-css.php?rev=3102541#L173

https://plugins.trac.wordpress.org/browser/ultimate-blocks/trunk/src/blocks/testimonial/block.php

https://plugins.trac.wordpress.org/browser/ultimate-blocks/trunk/src/blocks/styled-box/block.php

https://plugins.trac.wordpress.org/browser/ultimate-blocks/trunk/src/blocks/image-slider/block.php

https://plugins.trac.wordpress.org/browser/ultimate-blocks/trunk/src/blocks/how-to/block.php

https://plugins.trac.wordpress.org/browser/ultimate-blocks/trunk/src/blocks/advanced-heading/block.php

https://gist.github.com/webber-naut/0a8a4f810da286392a43c4614d31712e

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3