# CVE-2026-115673: CleanTalk Anti-Spam stored XSS in comment author email

Source: https://junglewise.ai/threats/cve-2026-115673-the-anti-spam-spam-firewall-by-cleantalk-wordpress-plugin-before  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-06. Updated: 2026-11-06  
License: CC BY 4.0 with a link back

CVE-2026-115673 · Severity: info · Published 2026-11-06

CleanTalk Anti-Spam is a WordPress plugin that filters spam comments. The plugin fails to sanitize user-supplied email addresses in comments, allowing attackers to inject malicious scripts that execute when site administrators review flagged comments, potentially leading to account compromise or malware distribution.

Vendors: [CleanTalk](https://junglewise.ai/threats/vendors/cleantalk).

## Quick answers

**Is CVE-2026-115673 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-115673 being exploited in the wild.

**How severe is CVE-2026-115673?** Informational severity, published 6 November 2026.

**Which products and versions are affected?** CleanTalk Anti-Spam, Spam FireWall before 6.91.

**Is there a fix for CVE-2026-115673?** Yes: fixed in 6.91. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-115673 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-115673?** Check whether you run CleanTalk Anti-Spam or Spam FireWall at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 6.91

## Technical details

The plugin contains a stored cross-site scripting (XSS) vulnerability in its handling of comment author email fields. An unauthenticated attacker can inject arbitrary JavaScript through a comment submission, which persists and executes in the administrator's browser when reviewing flagged comments on the spam-review admin screen. This requires no authentication from the attacker but depends on an admin viewing the malicious comment.

## Affected products

- CleanTalk Anti-Spam, Spam FireWall before 6.91

## Timeline

- 2026-11-04: disclosed
- 2026-11-06: advisory

## References

- [https://wpscan.com/vulnerability/087d91ac-2158-4f9b-8fab-4d17b14a7053/](https://wpscan.com/vulnerability/087d91ac-2158-4f9b-8fab-4d17b14a7053/)