CVE-2023-20208Network attack vector

Administrator-browser script execution via unvalidated page input

Published Nov 21, 2023 · Updated Aug 2, 2024

Cross-site scripting in affected Cisco Identity Services Engine 3.0 and 3.1 releases allows remote authenticated users to run browser scripts. Specific management-interface pages accept user-supplied input without validating alternate XSS syntax and execute the injected code. Valid administrative credentials and another user's interaction are required; execution occurs in the interface context and exposes browser-based information.

CVSS severity4.8
Medium
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Cross-site scripting in affected Cisco Identity Services Engine 3.0 and 3.1 releases allows remote authenticated users to run browser scripts. Specific management-interface pages accept user-supplied input without validating alternate XSS syntax and execute the injected code. Valid administrative credentials and another user's interaction are required; execution occurs in the interface context and exposes browser-based information.

The record

CVE
CVE-2023-20208
Published
Nov 21, 2023
Updated
Aug 2, 2024
Vendor
ClamAV
Product
Cisco Identity Services Engine
Classifications
CWE-87, CWE-79, T1189
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Nov 21, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.0.0
  2. Affected versionversion=3.0.0 p1
  3. Affected versionversion=3.0.0 p2
  4. Affected versionversion=3.0.0 p3
  5. Affected versionversion=3.0.0 p4
  6. Affected versionversion=3.0.0 p5
  7. Affected versionversion=3.0.0 p6
  8. Affected versionversion=3.0.0 p7
  9. Affected versionversion=3.1.0
  10. Affected versionversion=3.1.0 p1
  11. Affected versionversion=3.1.0 p3
  12. Affected versionversion=3.1.0 p4
  13. Affected versionversion=3.1.0 p5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

ClamAV · Cisco Identity Services Engineversion=3.0.0; version=3.0.0 p1; version=3.0.0 p2; version=3.0.0 p3; version=3.0.0 p4; version=3.0.0 p5; version=3.0.0 p6; version=3.0.0 p7; version=3.1.0; version=3.1.0 p1; version=3.1.0 p3; version=3.1.0 p4; version=3.1.0 p5

Published CVSS scores

4.8CiscoCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-87Improper Neutralization of Alternate XSS Syntax
CWE-79Improper Neutralization of Input During Web Page Generation
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo