TI-2025-08952 Aliases CVE-2025-9762 GHSA-42x6-84fc-386q

Post By Email <= 1.0.4b - Unauthenticated Arbitrary File Upload via Email Attachments

MEDIUM 50CWE-78Published 2025-09-30 · Updated 2026-04-08

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-78.

Summary

The Post By Email plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the save_attachments function in all versions up to, and including, 1.0.4b. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00727 54th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
westi	Post By Email	up to 1.0.4b	—	No fix listed	CNA

Post By Email Vendorwesti Affected up to 1.0.4b Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2025-9762
2026-10-03 Alias added: GHSA-42x6-84fc-386q

References

Other 2

TI-2024-09297 PJW Mime Config <= 1.0 - Authenticated (Author+) Stored Cross-Site Scripting via SVG File Upload CVSS 3.1MEDIUM 6.4

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences