What is CVE-2023-33840?

CVE-2023-33840 is a medium-severity vulnerability in IBM Security Verify Governance, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2023-10-23.

How severe is CVE-2023-33840?

Medium severity. CVSS v3 base score is 4.8 out of 10.

XSS in IBM Security Verify Governance

CVE-2023-33840

IBM Security Verify Governance 10.0 is vulnerable to cross-site scripting. This vulnerability allows users to embed arbitrary JavaScript code in the Web UI thus altering the intended functionality potentially leading to credentials disclosure within a trusted session. IBM X-Force ID: 256037.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2023-10-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (23.2th percentile), scored 2026-10-22.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 23.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

IBM Security Verify Governance — versions 10.0
IBM Security Verify Governance — versions 10.0, 10.0.1

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.ibm.com/support/pages/node/7057377 (vendor-advisory, Patch, Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/256037 (VDB Entry, vdb-entry, Vendor Advisory)

Frequently asked questions

What is CVE-2023-33840?: CVE-2023-33840 is a medium-severity vulnerability in IBM Security Verify Governance, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2023-10-23.
How severe is CVE-2023-33840?: Medium severity. CVSS v3 base score is 4.8 out of 10.