Security readout for executives and security teams
Plain-English summary
CVE-2020-3233 is a stored XSS issue in Cisco IOx Local Manager. An attacker who already has valid Local Manager credentials could save malicious script content in a system settings area, affecting users of that web interface and potentially exposing browser-based information.
Executive priority
Treat as a moderate-priority exposure management item. It is not known exploited from the provided sources, but stored XSS in an administrative interface can affect sensitive browser sessions if credentials are compromised or misused.
Technical view
The issue is CWE-79 caused by insufficient input validation in the Cisco IOx Application Framework web-based Local Manager interface. CVSS v3.0 is 6.4 with network access, low complexity, low privileges, changed scope, and low confidentiality and integrity impact.
Likely exposure
Exposure is limited to Cisco IOx deployments where the web-based Local Manager interface is enabled and reachable by authenticated users. The source bundle does not identify exact affected versions beyond Cisco IOx.
Exploitation context
The source bundle does not report active exploitation, and KEV status is false. Exploitation requires valid Local Manager credentials, then stored malicious content could execute in the affected web interface context.
Researcher notes
Evidence supports authenticated stored XSS in Cisco IOx Local Manager, but affected version detail and remediation specifics are not included in the provided bundle. Do not assume broader Cisco product exposure without Cisco advisory confirmation.
Mitigation direction
- Review Cisco's advisory for affected releases, fixed software, and official mitigations.
- Upgrade or apply Cisco-directed remediation where applicable.
- Restrict Local Manager access to trusted administrative networks and users.
- Audit Local Manager accounts and remove unnecessary credentials.
- Monitor for unexpected changes in system settings fields.
Validation and detection
- Inventory Cisco IOx devices and identify exposed Local Manager interfaces.
- Compare installed IOx software against Cisco advisory guidance.
- Confirm Local Manager is not reachable from untrusted networks.
- Review Local Manager account lists for unnecessary or stale users.
- Inspect recent system settings changes for unexpected script-like content.
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-2020-3233 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
- 6.4 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:L/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:L/UI:N/S:C/C:L/I:L/A:N3.12.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
6.4MediumVector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- 20200603 Cisco IOx Application Framework Local Manager 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.