Medium severity · published Dec 3, 2025
CVE-2025-12887
Post SMTP – Complete SMTP Solution with Logs, Alerts, Backup SMTP & Mobile App <= 3.6.1 - Missing Authorization to Authenticated (Subscriber+) OAuth Token Update
5.4
CVSS
0.3%
EPSS
No
On KEV
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. CVE-2025-67563 appears to be a duplicate of this issue.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 21% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PS
Affected product
PS
Post SMTP – Complete Email Deliverability and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App
saadiqbal
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-12887
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-12887
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/changeset/3402203
www.wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/5bd9f312-99e1-4dc2-855d-90339c2e24da?source=cve
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