Cisco Unified Computing System up to 4.3(5e) Virtual Keyboard Video Monitor cross site scripting

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4.4	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in Cisco Unified Computing System and Unified Computing System E-Series Software and classified as problematic. Affected by this issue is some unknown functionality of the component Virtual Keyboard Video Monitor. Performing a manipulation results in cross site scripting. This vulnerability is reported as CVE-2025-20342. The attack is possible to be carried out remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic has been found in Cisco Unified Computing System and Unified Computing System E-Series Software. This affects an unknown part of the component Virtual Keyboard Video Monitor. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-80. The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages. This is going to have an impact on integrity. The summary by CVE is:

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.

The advisory is shared at sec.cloudapps.cisco.com. This vulnerability is uniquely identified as CVE-2025-20342 since 10/10/2024. The exploitability is told to be easy. It is possible to initiate the attack remotely. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 261468 (Cisco Integrated Management Controller Virtual Keyboard Video Monitor Stored XSS (cisco-sa-ucs-kvmsxss-6h7AnUyk)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (261468) and CERT Bund (WID-SEC-2025-1917). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

• Cisco Unified Computing System (UCS)
• Cisco Integrated Management Controller

Productinfo

Type

• Virtualization Software

Vendor

• Cisco

Name

• Unified Computing System
• Unified Computing System E-Series Software

Version

• 3.2(1d)
• 3.2(2b)
• 3.2(2c)
• 3.2(2d)
• 3.2(2e)
• 3.2(2f)
• 3.2(3a)
• 3.2(3b)
• 3.2(3d)
• 3.2(3e)
• 3.2(3g)
• 3.2(3h)
• 3.2(3i)
• 3.2(3j)
• 3.2(3k)
• 3.2(3l)
• 3.2(3n)
• 3.2(3o)
• 3.2(3p)
• 4.0(1a)
• 4.0(1b)
• 4.0(1c)
• 4.0(1d)
• 4.0(2a)
• 4.0(2b)
• 4.0(2d)
• 4.0(2e)
• 4.0(4a)
• 4.0(4b)
• 4.0(4c)
• 4.0(4d)
• 4.0(4e)
• 4.0(4f)
• 4.0(4g)
• 4.0(4h)
• 4.0(4i)
• 4.0(4k)
• 4.0(4l)
• 4.0(4m)
• 4.0(4n)
• 4.0(4o)
• 4.1(1a)
• 4.1(1b)
• 4.1(1c)
• 4.1(1d)
• 4.1(1e)
• 4.1(2a)
• 4.1(2b)
• 4.1(2c)
• 4.1(3a)
• 4.1(3b)
• 4.1(3c)
• 4.1(3d)
• 4.1(3e)
• 4.1(3f)
• 4.1(3h)
• 4.1(3i)
• 4.1(3j)
• 4.1(3k)
• 4.1(3l)
• 4.1(3m)
• 4.1(3n)
• 4.1(4a)
• 4.2(1c)
• 4.2(1d)
• 4.2(1f)
• 4.2(1i)
• 4.2(1k)
• 4.2(1l)
• 4.2(1m)
• 4.2(1n)
• 4.2(2a)
• 4.2(2c)
• 4.2(2d)
• 4.2(2e)
• 4.2(3b)
• 4.2(3d)
• 4.2(3e)
• 4.2(3g)
• 4.2(3h)
• 4.2(3i)
• 4.2(3j)
• 4.2(3k)
• 4.2(3l)
• 4.2(3m)
• 4.2(3n)
• 4.2(3o)
• 4.3(2b)
• 4.3(2c)
• 4.3(2e)
• 4.3(2f)
• 4.3(3a)
• 4.3(3c)
• 4.3(4a)
• 4.3(4b)
• 4.3(4c)
• 4.3(4d)
• 4.3(4e)
• 4.3(4f)
• 4.3(5a)
• 4.3(5c)
• 4.3(5d)
• 4.3(5e)

License

• commercial

Website

• Vendor: https://www.cisco.com/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.4

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.4
CNA Vector (cisco): 🔒

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-80 / CWE-74 / CWE-707
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 261468
Nessus Name: Cisco Integrated Management Controller Virtual Keyboard Video Monitor Stored XSS (cisco-sa-ucs-kvmsxss-6h7AnUyk)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Timelineinfo

10/10/2024 CVE reserved
08/27/2025 +321 days Advisory disclosed
08/27/2025 +0 days VulDB entry created
09/08/2025 +12 days VulDB entry last update

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-ucs-kvmsxss-6h7AnUyk
Status: Confirmed

CVE: CVE-2025-20342 (🔒)
GCVE (CVE): GCVE-0-2025-20342
GCVE (VulDB): GCVE-100-321597
CERT Bund: WID-SEC-2025-1917 - Cisco UCS und IMC: Mehrere Schwachstellen

Entryinfo

Created: 08/27/2025 19:11
Updated: 09/08/2025 05:19
Changes: 08/27/2025 19:11 (65), 08/28/2025 11:21 (7), 08/30/2025 01:39 (1), 09/08/2025 05:19 (2)
Complete: 🔍
Cache ID: 216::103

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Discussion

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