Security readout for executives and security teams
Plain-English summary
CVE-2019-12667 is a stored cross-site scripting issue in Cisco IOS XE web management. An already-authenticated attacker could cause script to run in another web-interface user’s browser, potentially exposing browser-based sensitive information or changing page content. The source bundle does not show active exploitation.
Executive priority
Treat this as a medium-priority management-plane issue. It is not described as unauthenticated or actively exploited, but affected network devices are sensitive assets and should be reviewed promptly.
Technical view
Cisco describes insufficient validation of parameters passed to the IOS XE web server. The issue is CWE-79 stored XSS, remotely reachable, requiring high privileges, with low confidentiality and integrity impact and no availability impact. The provided affected product is Cisco IOS XE Software 16.4.1.
Likely exposure
Exposure is most relevant where Cisco IOS XE 16.4.1 devices have the web interface enabled and accessible to authenticated users. Risk increases if management access is broadly reachable or admin sessions are high-value.
Exploitation context
The bundle says exploitation requires an authenticated remote attacker and can involve a malicious link or injected request content. KEV is false, and no cited source in the bundle states active exploitation.
Researcher notes
Evidence is limited to the CVE record and Cisco advisory reference. Do not assume other IOS XE releases are affected from this bundle alone. The main validation focus is version, web-interface exposure, and authenticated user access.
Mitigation direction
- Inventory Cisco IOS XE devices and identify version 16.4.1 exposure.
- Check Cisco’s advisory for fixed software, workarounds, or product-specific guidance.
- Restrict web-interface access to trusted management networks and administrators.
- Review privileged web-interface accounts and remove unnecessary access.
- Monitor administrative web sessions for unusual script-driven behavior.
Validation and detection
- Confirm whether any devices run Cisco IOS XE Software 16.4.1.
- Verify whether the IOS XE web interface is enabled and reachable.
- Check who can authenticate to the affected web interface.
- Review change logs and admin activity around web-management sessions.
- Document vendor advisory status and remediation decisions.
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-2019-12667 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
- 5.5 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/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:H/UI:N/S:C/C:L/I:L/A:N2.32.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
5.5MediumVector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- 20190925 Cisco IOS XE Software Stored 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.