# Subscribe to Comments <= 2.3.1 - Unauthenticated Sensitive Information Exposure via Subscription Management Keys

- **ID:** WPSEC-2026-0589
- **Plugin:** Subscribe to Comments (`subscribe-to-comments`), https://wordpress.org/plugins/subscribe-to-comments/
- **Affected versions:** all versions before 2.3.2
- **Fixed in:** 2.3.2 (Update to 2.3.2 or later.)
- **Severity:** Medium 6.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N)
- **Weakness:** CWE-200
- **Usage among sites WPSec scans:** plugin Low, affected versions None seen (as of 2026-10-07)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/subscribe-to-comments
- **Fix released:** 2026-10-06
- **Published:** 2026-10-07
- **URL:** https://wpsec.com/vuln/WPSEC-2026-0589/

## Description

The Subscribe to Comments plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 2.3.1 via the comment subscription form and the 'subscribe without commenting' feature. This makes it possible for unauthenticated attackers to obtain the subscription-management key of another person's e-mail address and use it to manage that person's comment subscriptions.

## References

- https://wpsec.com/vuln/WPSEC-2026-0589/
- https://plugins.svn.wordpress.org/subscribe-to-comments/tags/2.3.2/
- https://wordpress.org/plugins/subscribe-to-comments/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-0589/

License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Free to use, share and adapt, also commercially, if you credit WPSec and link to this advisory.