bmarshall511 Zero Spam Plugin up to 5.7.10 on WordPress Contact Form 7 Integration zerospam_david_walsh_key cross site scripting

Summaryinfo

A vulnerability, which was classified as problematic, was found in bmarshall511 Zero Spam Plugin up to 5.7.10. This impacts an unknown function of the component Contact Form 7 Integration. Such manipulation of the argument zerospam_david_walsh_key leads to cross site scripting. This vulnerability is referenced as CVE-2026-96752. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in bmarshall511 Zero Spam Plugin up to 5.7.10. Affected by this issue is some unknown functionality of the component Contact Form 7 Integration. The manipulation of the argument zerospam_david_walsh_key with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. CVE summarizes:

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.

The advisory is shared for download at wordfence.com. This vulnerability is handled as CVE-2026-96752 since 09/23/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1059.007.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• WordPress Plugin

Vendor

• bmarshall511

Name

• Zero Spam Plugin

Version

• 5.7.0
• 5.7.1
• 5.7.2
• 5.7.3
• 5.7.4
• 5.7.5
• 5.7.6
• 5.7.7
• 5.7.8
• 5.7.9
• 5.7.10

CPE 2.3info

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• 🔒
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CPE 2.2info

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