What is CVE-2025-36223?

CVE-2025-36223 is a medium-severity vulnerability in IBM Openpages, classified under Improper Neutralization of HTTP Headers for Scripting Syntax. CVSS score: 5.4/10. Published 2025-11-12.

How severe is CVE-2025-36223?

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

Vulnerability in IBM Openpages

CVE-2025-36223

IBM OpenPages 9.0 and 9.1 is vulnerable to HTTP header injection, caused by improper validation of input by the HOST headers. This could allow an attacker to conduct various attacks against the vulnerable system, including cross-site scripting, cache poisoning or session hijacking.

Published 2025-11-12 · last modified 2026-10-18.

CVSS v3 metric

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

EPSS exploit prediction

EPSS: 0.002 (7.0th percentile), scored 2026-10-20.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 7th percentile — 7.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000

Affected products

IBM Openpages — versions 9.0, 9.1, 9.1.0

Weakness classification (CWE)

CWE-644 — Improper Neutralization of HTTP Headers for Scripting Syntax

References

www.ibm.com/support/pages/node/7250239 (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2025-36223?: CVE-2025-36223 is a medium-severity vulnerability in IBM Openpages, classified under Improper Neutralization of HTTP Headers for Scripting Syntax. CVSS score: 5.4/10. Published 2025-11-12.
How severe is CVE-2025-36223?: Medium severity. CVSS v3 base score is 5.4 out of 10.