CVE-2025-20342
mediumpriority · track · 0EPSS 0.002 · 13 %ileDEEUUSEPSS · scored 2026-10-27
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.
remediations
Vendor fix, mitigation, or workaround guidance, as published by each source.
A vendor fix is available.
- FixedCisco Unified Computing System (Managed)cisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco Unified Computing System (Standalone)cisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco Unified Computing System E-Series Software (UCSE)cisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (350)
Products and version ranges known to be affected.
- Cisco Unified Computing System (UCS) B-Seriesall versionscert_bundDEcpe:/h:cisco:unified_computing_system:b-series
- Cisco Unified Computing System (UCS) C-Seriesall versionscert_bundDEcpe:/h:cisco:unified_computing_system:c-series
- Cisco Unified Computing System (UCS) E-Seriesall versionscert_bundDEcpe:/h:cisco:unified_computing_system:e-series
- Cisco Unified Computing System (UCS) Manager Softwareall versionscert_bundDEcpe:/h:cisco:unified_computing_system:manager_software
- Cisco Unified Computing System (UCS) X-Seriesall versionscert_bundDEcpe:/h:cisco:unified_computing_system:x-series
advisories (2)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2025-1917Cisco UCS und IMC: Mehrere SchwachstellenDeutsch2025-08-27csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen im Cisco Unified Computing System (UCS) und im Cisco Integrated Management Controller ausnutzen, um Administratorrechte zu erlangen, Cross-Site-Scripting-Angriffe durchzuführen, vertrauliche Informationen offenzulegen, Daten zu manipulieren oder Benutzer auf bösartige Websites umzuleiten.
- cisco-sa-ucs-kvmsxss-6h7AnUykCisco Integrated Management Controller Virtual Keyboard Video Monitor Stored Cross-Site Scripting Vulnerability2025-08-27csaf · cisco_csafUS
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. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (4)
External citations — patches, advisories, analysis.
- https://nvd.nist.gov/vuln/detail/CVE-2025-20342cnnvd
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ucs-kvmsxss-6h7AnUykcnnvd
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ucs-kvmsxss-6h7AnUykenisa_euvd
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ucs-kvmsxss-6h7AnUyknvd
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