Security readout for executives and security teams
Plain-English summary
CVE-2020-3311 lets an attacker redirect a Cisco Firepower Management Center user to a malicious web page through the FMC web interface. It does not directly provide system control, but it can support phishing or credential-theft attempts against administrators.
Executive priority
Treat this as a moderate-priority hardening item. It is not described as actively exploited, but FMC is a security-management platform, so phishing risk against administrators deserves timely review and vendor-guided remediation.
Technical view
The issue is a CWE-601 open redirect in Cisco FMC Software caused by improper validation of HTTP request parameters. The CVSS 3.0 score is 4.3, with network attack vector, no privileges required, user interaction required, and limited confidentiality impact.
Likely exposure
Exposure is limited to organizations using Cisco Firepower Management Center Software. The provided bundle does not identify affected versions, so teams must confirm applicability against Cisco's advisory and their deployed FMC versions.
Exploitation context
The sources describe remote unauthenticated exploitation requiring user interaction and interception or modification of a user's HTTP request. CISA KEV status is false, and the bundle provides no evidence of active exploitation.
Researcher notes
The bundle lacks affected version ranges and remediation detail beyond the Cisco advisory reference. Analysis should stay scoped to FMC web-interface open redirect behavior and avoid assuming broader Cisco Firepower product exposure.
Mitigation direction
- Review Cisco's advisory for affected and fixed FMC releases.
- Apply Cisco-recommended updates or workarounds where applicable.
- Limit FMC web interface access to trusted administrative networks.
- Train administrators to verify FMC URLs before authentication.
- Monitor for suspicious redirects during FMC web sessions.
Validation and detection
- Inventory all Cisco FMC deployments and software versions.
- Compare deployed versions against Cisco's advisory.
- Check whether FMC web access is reachable from untrusted networks.
- Review web and security logs for unexpected redirect destinations.
- Confirm administrators use trusted bookmarks or managed access paths.
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-601: 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-2020-3311 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 4.3 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/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:U/C:L/I:N/A:N2.81.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
4.3MediumVector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- 20200506 Cisco Firepower Management Center Open Redirect 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.
URL Redirection to Untrusted Site ('Open Redirect')
URL Redirection to Untrusted Site ('Open Redirect') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.