CleanTalk Spam Protection up to 6.86 on WordPress Comment Content aria-label cross site scripting

Summaryinfo

A vulnerability described as problematic has been identified in CleanTalk Spam Protection, Honeypot and Anti-Spam by CleanTalk Plugin up to 6.86. This affects an unknown function of the component Comment Content. The manipulation of the argument aria-label results in cross site scripting. This vulnerability is cataloged as CVE-2026-77830. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in CleanTalk Spam Protection, Honeypot and Anti-Spam by CleanTalk Plugin up to 6.86. It has been classified as problematic. Affected is an unknown code block of the component Comment Content. The manipulation of the argument aria-label with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as 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. This is going to have an impact on integrity. CVE summarizes:

The Spam protection, Honeypot, Anti-Spam by CleanTalk plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Comment Content aria-label Placeholder in all versions up to, and including, 6.86 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with custom-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The payload is deliverable via unauthenticated comment submission and executes exclusively for non-logged-in visitors; if comment moderation is enabled, an approving moderator must first publish the comment before the script reaches other users.

The advisory is shared for download at wordfence.com. This vulnerability is traded as CVE-2026-77830 since 08/21/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. 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-2026-71878). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• WordPress Plugin

Vendor

• CleanTalk

Name

• Anti-Spam by CleanTalk Plugin
• Honeypot
• Spam Protection

Version

• 6.0
• 6.1
• 6.2
• 6.3
• 6.4
• 6.5
• 6.6
• 6.7
• 6.8
• 6.9
• 6.10
• 6.11
• 6.12
• 6.13
• 6.14
• 6.15
• 6.16
• 6.17
• 6.18
• 6.19
• 6.20
• 6.21
• 6.22
• 6.23
• 6.24
• 6.25
• 6.26
• 6.27
• 6.28
• 6.29
• 6.30
• 6.31
• 6.32
• 6.33
• 6.34
• 6.35
• 6.36
• 6.37
• 6.38
• 6.39
• 6.40
• 6.41
• 6.42
• 6.43
• 6.44
• 6.45
• 6.46
• 6.47
• 6.48
• 6.49
• 6.50
• 6.51
• 6.52
• 6.53
• 6.54
• 6.55
• 6.56
• 6.57
• 6.58
• 6.59
• 6.60
• 6.61
• 6.62
• 6.63
• 6.64
• 6.65
• 6.66
• 6.67
• 6.68
• 6.69
• 6.70
• 6.71
• 6.72
• 6.73
• 6.74
• 6.75
• 6.76
• 6.77
• 6.78
• 6.79
• 6.80
• 6.81
• 6.82
• 6.83
• 6.84
• 6.85
• 6.86

CPE 2.3info

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CPE 2.2info

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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