CVE-2026-6378
Maxi Blocks <= 2.1.9 - Authenticated (Author+) Stored Cross-Site Scripting via Style Card REST API
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
The Maxi Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `/wp-json/maxi-blocks/v1.0/style-card` REST API endpoint in all versions up to, and including, 2.1.9 due to insufficient input sanitization and output escaping of the `sc_styles` parameter. This makes it possible for authenticated attackers, with Author-level access and above, to inject arbitrary web scripts that execute on every page where the plugin's style card styles are loaded, including across the entire WordPress admin panel.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- ckp267 MaxiBlocks Builder | 17,000+ Design Assets, Patterns, Icons & Starter Sites
through 2.1.9
References 10
plugins.trac.wordpress.org
- browser/maxi-blocks/tags/2.1.9/core/class-maxi-api.php#L979
- browser/maxi-blocks/tags/2.1.9/core/class-maxi-api.php#L221
- browser/maxi-blocks/tags/2.1.9/core/class-maxi-style-cards.php#L197
- browser/maxi-blocks/tags/2.1.10/core/class-maxi-api.php#L979
- browser/maxi-blocks/tags/2.1.10/core/class-maxi-api.php#L981
- browser/maxi-blocks/tags/2.1.10/core/class-maxi-api.php#L987
- browser/maxi-blocks/tags/2.1.10/core/class-maxi-api.php#L1010
- browser/maxi-blocks/tags/2.1.10/core/class-maxi-api.php#L1021