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Description

The Post SMTP plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 3.6.1. This is due to the plugin not properly verifying that a user is authorized to update OAuth tokens on the 'handle_gmail_oauth_redirect' function. This makes it possible for authenticated attackers, with subscriber level access and above, to inject invalid or attacker-controlled OAuth credentials.

PUBLISHED Reserved 2025-11-07 | Published 2025-12-03 | Updated 2025-12-03 | Assigner Wordfence




MEDIUM: 5.4CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

Problem types

CWE-862 Missing Authorization

Product status

Default status
unaffected

* (semver)
affected

Timeline

2025-11-01:Discovered
2025-11-07:Vendor Notified
2025-12-03:Disclosed

Credits

M Indra Purnama finder

References

www.wordfence.com/...-99e1-4dc2-855d-90339c2e24da?source=cve

plugins.trac.wordpress.org/changeset/3402203

cve.org (CVE-2025-12887)

nvd.nist.gov (CVE-2025-12887)