Security readout for executives and security teams
Plain-English summary
Cisco ISE had an XSS flaw in its web-based guest portal. An attacker would need to trick a user into clicking a crafted link. If successful, script could run in the user's browser session and expose browser-accessible information or alter interface content.
Executive priority
Handle through normal vulnerability management unless ISE portals are broadly exposed or high-privilege users frequently access them. The main business risk is credential-adjacent browser compromise through administrator interaction, not unauthenticated system takeover.
Technical view
CVE-2019-12631 is CWE-79 in Cisco Identity Services Engine Software. The issue is insufficient validation of user-supplied input processed by the web-based management interface. CVSS 3.0 is 6.1, network exploitable, low complexity, no privileges, user interaction required, changed scope, low confidentiality and integrity impact.
Likely exposure
Exposure is limited to organizations running Cisco ISE Software with the vulnerable guest portal. The bundle does not identify affected or fixed versions, so asset owners must confirm applicability against Cisco's advisory.
Exploitation context
The provided sources do not report active exploitation, and this CVE is not marked KEV. Exploitation requires social engineering a user into opening a crafted link, then executing script in the browser context of the interface.
Researcher notes
Evidence supports reflected or stored web input validation failure only at the level described in the CVE text. The source bundle does not provide affected version ranges, fixed versions, proof-of-concept status, or confirmed exploitation.
Mitigation direction
- Review Cisco's advisory for affected releases and fixed-release guidance.
- Reduce access to ISE guest and management interfaces where operationally possible.
- Warn ISE administrators against unsolicited links targeting ISE portals.
- Prioritize remediation for externally reachable or broadly accessible deployments.
Validation and detection
- Inventory Cisco ISE deployments and guest portal exposure.
- Compare deployed ISE versions against Cisco's advisory.
- Confirm administrative interfaces are not unnecessarily exposed.
- Review security monitoring for suspicious ISE portal link activity.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2019-12631 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.1 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N2.82.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
6.1MediumVector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- 20191002 Cisco Identity Services Engine Cross-Site Scripting VulnerabilityCVE reference · vendor-advisory, x_refsource_CISCO
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.