What is CVE-2023-20208?

CVE-2023-20208 is a medium-severity vulnerability in Cisco Identity Services Engine Software, classified under Improper Neutralization of Alternate XSS Syntax. CVSS score: 4.8/10. Published 2023-11-21.

How severe is CVE-2023-20208?

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

XSS in Cisco Identity Services Engine Software

CVE-2023-20208

A vulnerability in the web-based management interface of Cisco ISE could allow an authenticated, remote attacker to conduct an XSS attack against a user of the web-based management interface of an affected device.

Published 2023-11-21 · 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: 0.005 (37.9th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 37.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Cisco Identity Services Engine Software — versions 3.0.0, 3.0.0 p1, 3.0.0 p2
Cisco Identity Services Engine — versions 3.0.0, 3.1, 3.2

Weakness classification (CWE)

References

sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-… (Vendor Advisory)

Frequently asked questions

What is CVE-2023-20208?: CVE-2023-20208 is a medium-severity vulnerability in Cisco Identity Services Engine Software, classified under Improper Neutralization of Alternate XSS Syntax. CVSS score: 4.8/10. Published 2023-11-21.
How severe is CVE-2023-20208?: Medium severity. CVSS v3 base score is 4.8 out of 10.