# Postie <= 1.9.87 - Unauthenticated Sensitive Information Exposure via Debug Output

- **ID:** WPSEC-2026-1627
- **Plugin:** Postie (`postie`), https://wordpress.org/plugins/postie/
- **Affected versions:** from 1.9.77 before 1.9.88
- **Fixed in:** 1.9.88 (Update to 1.9.88 or later.)
- **Severity:** Medium 5.9 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N)
- **Weakness:** CWE-200
- **Usage among sites WPSec scans:** plugin Low, affected versions None seen (as of 2026-10-25)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/postie
- **Fix released:** 2026-10-23
- **Published:** 2026-10-24
- **URL:** https://wpsec.com/vuln/WPSEC-2026-1627/

## Description

The Postie plugin for WordPress is vulnerable to Sensitive Information Exposure in versions 1.9.77 up to, and including, 1.9.87 via the mail check endpoint (?postie=get-mail). This is due to the plugin printing its full configuration, including the mailbox password, in debug output that is returned in the HTTP response; the code intended to remove the password before the dump has no effect on the settings object. This makes it possible for unauthenticated attackers to obtain the credentials of the mailbox Postie reads from on sites where Postie's debug logging is enabled.

## References

- https://wpsec.com/vuln/WPSEC-2026-1627/
- https://plugins.svn.wordpress.org/postie/tags/1.9.88/
- https://wordpress.org/plugins/postie/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-1627/

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.