Security readout for executives and security teams
Plain-English summary
Cisco FMC's web management interface had multiple XSS flaws. A highly privileged logged-in attacker could trick an interface user into opening a crafted link, causing script to run in that user's browser session. Business impact is mainly browser-session data exposure and unauthorized interface actions, not direct system takeover from the CVE text.
Executive priority
Treat as a scheduled security maintenance item unless FMC is broadly reachable or administrator workflows are high risk. The flaw needs privileged access and user interaction, but it affects a security management platform, so remediation should not be ignored.
Technical view
CVE-2019-15269 is CWE-79 in Cisco Firepower Management Center's web UI from insufficient validation of user-supplied input. CVSS 3.0 is 4.8: AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N. Exploitation requires network access, high privileges, and user interaction; confidentiality and integrity impact are low, with no availability impact.
Likely exposure
Exposure is limited to organizations running Cisco Firepower Management Center with reachable web-based management access. Risk is higher where many administrators use FMC through browsers or where management interfaces are accessible beyond tightly controlled administrative networks.
Exploitation context
The provided sources do not show active exploitation, and this CVE is not listed as KEV. The attacker must already be authenticated with high privileges and must persuade a management-interface user to click a crafted link.
Researcher notes
Evidence is incomplete on affected versions and exact fixed releases in the supplied bundle. Validate against Cisco's advisory before scoping. Focus review on authenticated XSS paths in FMC web UI and on whether administrative browser sessions could expose sensitive interface data.
Mitigation direction
- Review Cisco's advisory for affected and fixed FMC releases.
- Upgrade FMC according to Cisco's published remediation guidance.
- Restrict FMC web access to trusted administrative networks.
- Limit FMC administrative privileges to required personnel only.
- Train administrators to avoid unsolicited FMC management links.
Validation and detection
- Inventory Cisco Firepower Management Center deployments and versions.
- Confirm FMC web interfaces are not broadly reachable.
- Check whether deployed versions are covered by Cisco's advisory.
- Verify administrative accounts are limited and reviewed.
- Review browser-session protections and admin phishing controls.
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-2019-15269 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
- 4.8 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:H/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:H/UI:R/S:C/C:L/I:L/A:N1.72.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
4.8MediumVector: CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- 20191016 Cisco Firepower Management Center Multiple Cross-Site Scripting VulnerabilitiesCVE 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.