Zero Spam for WordPress <= 5.7.10 - Unauthenticated Stored Cross-Site Scripting via Nested POST Array Keys via Contact Form 7 Integration
| CVE | CVE-2026-96752 |
|---|---|
| CVSS | 7.2 (High) |
| Publicly Published | September 24, 2026 |
| Last Updated | September 25, 2026 |
| Researcher |
Adrien Brunner
|
Description
The Zero Spam for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Nested POST Array Keys via Contact Form 7 Integration in all versions up to, and including, 5.7.10 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The payload is delivered by submitting a Contact Form 7 request with a nested POST array key containing arbitrary HTML or JavaScript — PHP parses the field name into a nested array key, which is stored verbatim in the zerospam_log.submission_data column when Zero Spam flags the submission as spam due to the absence of the zerospam_david_walsh_key field.
Learn more about Cross-Site Scripting vulnerabilities and how to prevent them.
References
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
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Vulnerability Details for Zero Spam for WordPress
| Software Type | Plugin |
|---|---|
| Software Slug | zero-spam (view on wordpress.org) |
| Patched? | Yes |
| Remediation | Update to version 5.7.11, or a newer patched version |
| Affected Version |
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| Patched Version |
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Recent vulnerabilities in Zero Spam for WordPress
| # | Title | CVE ID | CVSS | Researchers | Date |
|---|---|---|---|---|---|
| 1 | Zero Spam <= 5.5.6 - Spam Protection Bypass | CVE-2024-32521 | Brandon James Roldan (tomorrowisnew) | April 15, 2024 | |
| 2 | Zero Spam <= 5.4.4 - Authenticated (Administrator+) SQL Injection | CVE-2023-32121 | OZ1NG (TOOR, LISA) | May 9, 2023 | |
| 3 | Zero Spam for WordPress <= 5.4.4 - Authenticated(Administrator+) SQL Injection | May 8, 2023 | |||
| 4 | Zero Spam <= 5.2.10 - Admin+ SQL Injection | CVE-2022-0254 | ZhongFu Su | February 18, 2022 | |
| 5 | WordPress Zero Spam <= 2.1.1 - SQL Injection | thiagolcks | August 24, 2016 |
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