HTML Injection Vulnerability in WP Mail Logging Plugin by WordPress
CVE-2026-1661

4.3MEDIUM

Key Information:

Vendor

WordPress
Status
WP Mail Logging
Vendor
CVE Published:
2 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-1661?

The WP Mail Logging plugin for WordPress, prior to version 1.17.0, is susceptible to an HTML injection vulnerability. This flaw arises from inadequate restrictions on the HTML and CSS of logged emails, which are displayed on admin log screens. An attacker can exploit this vulnerability by sending styled content or links through a public contact form, redirecting the administrator's browser to a malicious site. This poses significant security risks by potentially misleading administrators who oversee email logs, highlighting the importance of updating to the latest version.

Affected Version(s)

WP Mail Logging 0 < 1.17.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-1661 - Proof of Concept

References

https://wpscan.com/vulnerability/dde19119-7ea8-4d02-bf89-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Kasia Sok
WPScan
.