# Subscribe to Comments <= 2.3.2 - Unauthenticated Sensitive Information Exposure via Subscriptions to Non-Public Posts

- **ID:** WPSEC-2026-0603
- **Plugin:** Subscribe to Comments (`subscribe-to-comments`), https://wordpress.org/plugins/subscribe-to-comments/
- **Affected versions:** all versions before 2.3.3
- **Fixed in:** 2.3.3 (Update to 2.3.3 or later.)
- **Severity:** Low 3.7 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/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-2026-0603/

## Description

The Subscribe to Comments plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 2.3.2 via the 'subscribe without commenting' feature, which does not check whether a post is publicly viewable. This makes it possible for unauthenticated attackers to subscribe to private or password-protected posts and receive their titles and new comments by e-mail.

## References

- https://wpsec.com/vuln/WPSEC-2026-0603/
- https://plugins.svn.wordpress.org/subscribe-to-comments/tags/2.3.3/
- https://wordpress.org/plugins/subscribe-to-comments/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-0603/

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.