CVE-2025-11833
CriticalExploitedPost SMTP – Complete SMTP Solution with Logs, Alerts, Backup SMTP & Mobile App <= 3.6.0 - Missing Authorization to Account Takeover via Unauthenticated Email Log Disclosure
Published Nov 3, 2025 · Updated Apr 8, 2026 · Also known as 491f44fc-712c-4f67-b5c2-a7396941afc1
Key Facts
Patch immediately- CVE-2025-11833 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting post-smtp (wordpress-plugin), Post SMTP – Complete Email Deliverability and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App.
- It is exploited in the wild, listed in Industry KEV feed since Nov 1, 2025. No public exploit code is known.
- EPSS estimates a 61% probability of exploitation in the next 30 days.
- Fixed versions are available, including post-smtp 3.6.1.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
61%
Higher than 99.1% of all scored CVEs
Exploited in the wild
Yes
1 catalog listing
Public exploit code
None known
Get the full CVE-2025-11833 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
The Post SMTP – Complete SMTP Solution with Logs, Alerts, Backup SMTP & Mobile App plugin for WordPress is vulnerable to unauthorized access of data due to a missing capability check on the construct function in all versions up to, and including, 3.6.0. This makes it possible for unauthenticated attackers to read arbitrary logged emails sent through the Post SMTP plugin, including password reset emails containing password reset links, which can lead to account takeover.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Nov 1, 2025 | n/a | Not reported |
Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Affected Products
2 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| post-smtpwordpress-plugin | See advisory | 3.6.1 |
| Post SMTP – Complete Email Deliverability and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App | See advisory | n/a |
Patched Releases
post-smtp
3.6.1
Timeline
Added to Industry KEV feed
Nov 1, 2025
Publicly disclosed
Nov 3, 2025
Last updated
Apr 8, 2026
Weakness Type
- CWE-862 Missing Authorization
References
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2025-11499
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2025-11833
- advisoryUSOM advisory
- advisoryhttps://www.wordfence.com/threat-intel/vulnerabilities/id/491f44fc-712c-4f67-b5c2-a7396941afc1?source=api-prod
- advisoryhttps://www.wordfence.com/threat-intel/vulnerabilities/id/491f44fc-712c-4f67-b5c2-a7396941afc1?source=api-scan
FAQ
Common Questions.
The Post SMTP – Complete SMTP Solution with Logs, Alerts, Backup SMTP & Mobile App plugin for WordPress is vulnerable to unauthorized access of data due to a missing capability check on the construct function in all versions up to, and including, 3.6.0.
Affected: post-smtp (wordpress-plugin); Post SMTP – Complete Email Deliverability and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since Nov 1, 2025.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including post-smtp 3.6.1.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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