Security readout for executives and security teams
Plain-English summary
This is a cross-site scripting issue in Cisco Unified Communications web management interfaces. An attacker does not need an account, but must convince an interface user to open a crafted link. Success could run script in that user's browser session or expose browser-accessible sensitive information.
Executive priority
Treat this as a moderate-priority administrative interface risk. It is not described as wormable or actively exploited, but compromise of administrator browser context could affect sensitive communications infrastructure management.
Technical view
The bundle describes improper validation of user-supplied input in Cisco Unified CM, Unified CM IM&P, Unified CM SME, and Cisco Unity Connection web management interfaces. CVSS 3.1 is 6.1 with network access, low complexity, no privileges, required user interaction, changed scope, and low confidentiality/integrity impact.
Likely exposure
Exposure is most relevant where Cisco Unified Communications web-based management interfaces are reachable by administrators or interface users. The bundle does not provide affected version ranges, so product and version exposure must be confirmed against Cisco's advisory.
Exploitation context
The supplied sources do not indicate active exploitation, and the CVE is not marked KEV. Exploitation requires social engineering an interface user into clicking a crafted link, then executing script in the affected interface context.
Researcher notes
The record describes XSS behavior, while the supplied CWE field lists CWE-89. Use the vendor advisory and CVE record as primary sources, and verify taxonomy before reporting. Avoid assuming affected versions because the bundle does not include them.
Mitigation direction
- Review Cisco's advisory for fixed releases and upgrade guidance.
- Prioritize internet-reachable or broadly reachable management interfaces.
- Restrict management interface access to trusted administrative networks.
- Warn administrators about unsolicited links targeting management sessions.
- Monitor Cisco guidance for product-specific remediation details.
Validation and detection
- Inventory Cisco Unified Communications products named in the advisory.
- Confirm running versions against Cisco's advisory matrix.
- Identify whether management interfaces are internet or broadly network reachable.
- Review access controls for administrative web interfaces.
- Check logs for suspicious management-interface link activity.
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-89: Database access and collection lookup
Injection into data stores can inform collection, data access, and exfiltration detection reviews. 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-2021-1407 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
- 6.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/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:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N2.82.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.1MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- 20210407 Cisco Unified Communications Products 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.
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