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.

Published · last modified .

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.

EPSS exploit prediction

EPSS: 0.003 (18.6th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 18.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-2811: held from 0.002 to 0.003.

EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001

Affected products

  • Ajaxify Comments

Weakness classification (CWE)

References

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.