Identity Services EngineApplication · Cisco
CVE-2024-20530
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedA vulnerability in the web-based management interface of Cisco ISE could allow an unauthenticated, remote attacker to conduct an XSS attack against a user of the interface. This vulnerability exists because the web-based management interface does not properly validate user-supplied input. An attacker could exploit this vulnerability by persuading a user of the interface to click a crafted link. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceCross-Site Scripting (XSS) vulnerability in Cisco ISE's web-based management interface due to improper validation of user-supplied input. An unauthenticated attacker can inject malicious scripts via crafted links that execute in the context of the affected interface, potentially exposing sensitive browser-based information.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data
Identity Services EngineApplication
= 3.0.0= 3.1.0= 3.2.0= 3.3.0= 3.4.0CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
-
Identify the installed Cisco ISE versionLog into the Cisco ISE CLI and run the command 'show version' or access the web interface and check the About page to find the exact version numberAffected if The installed version is 3.0.0, 3.1.0, 3.2.0, 3.3.0, or 3.4.0 exactly (these are the specific affected versions listed)
-
Determine if the web-based management interface is enabledCheck the Cisco ISE configuration via CLI using 'show running-config | include http' or access the admin console to verify the web interface is activeAffected if The web-based management interface is accessible and enabled, as this is the attack vector for the XSS vulnerability
-
Verify external exposure of the management interfaceReview network accessibility of the ISE admin portal by checking firewall rules or conducting a port scan (TCP 443 or 8443) from outside the trusted networkAffected if The ISE web management interface is externally accessible without VPN or proper network segmentation, increasing exposure to unauthenticated attackers
-
Review logs for suspicious link patternsExamine Cisco ISE logs (via 'show logging' or the monitoring logs) for any unusual URL parameters or script injection patterns in authentication or portal access logsAffected if Unexpected URL patterns containing '<script>', 'javascript:', or similar XSS payloads appear in the logs, indicating possible exploitation attempts
You are affected if your Cisco ISE version is exactly 3.0.0, 3.1.0, 3.2.0, 3.3.0, or 3.4.0 AND the web-based management interface is accessible (internally or externally).
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scopedApply the vendor patch from Cisco when available; until then, user awareness training to avoid clicking untrusted links is the primary risk mitigation.
Cisco ISE 3.3.1 or latest 3.x patch release
- 1. Access the Cisco ISE administration portal
- 2. Navigate to Administration > System > Settings > Server Certificate to backup current configuration
- 3. Download and install the latest Cisco ISE 3.x patch release that addresses CVE-2024-20530 from Cisco's software download center
- 4. After patch installation, verify the patch was applied successfully by checking the ISE version under Administration > System > Licensing
- 5. Clear browser cache and test that the XSS vulnerability is remediated by attempting to validate input handling in affected interface areas
Generated from the published advisory — verify against the referenced sources before acting.
Fix this in Identity Services Engine
Scoped from the published advisory
- Consultation2.0 h
- Implementation4.0 h
- Testing6.0 h
- Review / QA3.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,096.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-20530 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2024-20530 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data