What is CVE-2026-2811?

CVE-2026-2811 is a medium-severity vulnerability in Ajaxify Comments, classified under HTTP Response Splitting. CVSS score: 5.4/10. Published 2026-09-02.

How severe is CVE-2026-2811?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Vulnerability in Ajaxify Comments

CVE-2026-2811

The Ajaxify Comments WordPress plugin before 3.2 is vulnerable to HTTP Header Injection due to insufficient input sanitization and output escaping on user-supplied data. This makes it possible for unauthenticated attackers to inject arbitrary HTTP headers.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.

Affected products

Unknown Ajaxify Comments

Weakness classification (CWE)

CWE-113 — HTTP Response Splitting

References

contact@wpscan.com (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-2811?: CVE-2026-2811 is a medium-severity vulnerability in Ajaxify Comments, classified under HTTP Response Splitting. CVSS score: 5.4/10. Published 2026-09-02.
How severe is CVE-2026-2811?: Medium severity. CVSS v3 base score is 5.4 out of 10.