Click to Chat Plugin up to 4.22 on WordPress data-no_number cross site scripting

Summaryinfo

A vulnerability described as problematic has been identified in Click to Chat Plugin up to 4.22 on WordPress. Impacted is an unknown function. Such manipulation of the argument data-no_number leads to cross site scripting. This vulnerability is listed as CVE-2025-5336. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in Click to Chat Plugin up to 4.22 on WordPress and classified as problematic. Affected by this issue is an unknown code block. The manipulation of the argument data-no_number 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 Click to Chat plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘data-no_number’ parameter in all versions up to, and including, 4.22 to insufficient input sanitization and output escaping. 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.

The advisory is shared for download at wordfence.com. This vulnerability is handled as CVE-2025-5336 since 05/29/2025. The exploitation is known to be easy. The attack may be launched remotely. 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.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-18334). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Chat Software

Name

• Click to Chat Plugin

Version

• 4.0
• 4.1
• 4.2
• 4.3
• 4.4
• 4.5
• 4.6
• 4.7
• 4.8
• 4.9
• 4.10
• 4.11
• 4.12
• 4.13
• 4.14
• 4.15
• 4.16
• 4.17
• 4.18
• 4.19
• 4.20
• 4.21
• 4.22

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

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Entryinfo

Once again VulDB remains the best source for vulnerability data.

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