HTTP Header Injection Vulnerability in Ajaxify Comments Plugin by WordPress
CVE-2026-2811

5.4MEDIUM

Key Information:

Vendor

WordPress
Status
Ajaxify Comments
Vendor
CVE Published:
2 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-2811?

The Ajaxify Comments WordPress plugin prior to version 3.2 is susceptible to HTTP Header Injection. This vulnerability arises from inadequate input sanitization and output escaping of data provided by users. As a result, unauthenticated attackers could potentially inject arbitrary HTTP headers, which may lead to further exploitation or malicious activities. Website administrators should ensure they update to the latest version of the plugin to mitigate associated risks.

Affected Version(s)

Ajaxify Comments 0 < 3.2

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-2026-2811 - Proof of Concept

References

https://wpscan.com/vulnerability/48250628-9b81-4bef-b623-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
5.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
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

Azmi Alsarayrah
WPScan
.