Security readout for executives and security teams
Plain-English summary
Cisco Firepower Management Center has a stored XSS flaw in its web management interface. An attacker with valid administrator credentials could place script content where another interface user later views it, potentially exposing browser-based information or altering interface behavior in that user’s session.
Executive priority
Treat this as a moderate management-plane risk, not an emergency by itself. Prioritize confirmation during routine vulnerability management, especially if FMC is administered by many users or reachable through broad remote access paths.
Technical view
The issue is CWE-79 caused by insufficient validation of user-supplied input in Cisco FMC’s web interface. CVSS 3.0 is 4.8: network reachable, low complexity, high privileges required, user interaction required, changed scope, low confidentiality and integrity impact, no availability impact.
Likely exposure
Exposure applies to Cisco Firepower Management Center deployments. The source bundle does not identify specific affected versions. Practical exposure is higher where FMC administration is broadly delegated, shared, or reachable from remote administrative networks.
Exploitation context
The attacker must already have valid administrator credentials and must rely on another user viewing the affected interface content. The source bundle does not show CISA KEV listing or any cited evidence of active exploitation.
Researcher notes
Available evidence supports stored XSS in the FMC web UI with PR:H and UI:R constraints. The bundle lacks affected version ranges, fixed releases, workarounds, and exploitation-in-the-wild evidence, so validation should start with Cisco’s advisory and local FMC inventory.
Mitigation direction
- Review Cisco’s advisory for affected and fixed FMC releases before scheduling remediation.
- Restrict FMC management access to trusted administrative networks and authenticated administrators.
- Audit administrator accounts and remove unnecessary or shared high-privilege access.
- Monitor Cisco guidance for any documented workaround or software update path.
Validation and detection
- Inventory Cisco FMC instances and record running software versions.
- Compare discovered versions with the Cisco advisory’s affected and fixed release information.
- Review FMC administrator account assignments for unnecessary privileged access.
- Check whether FMC web management is reachable outside intended administrative networks.
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-2019-15280 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 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.