CVE-2024-20533
mediumpriority · track · 0EPSS 0.003 · 22 %ileDEEURUUSEPSS · scored 2026-10-27
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.
remediations
Vendor fix, mitigation, or workaround guidance, as published by each source.
A vendor fix is available.
- FixedCisco IP Phones with Multiplatform Firmwarecisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco Session Initiation Protocol (SIP) Softwarecisco_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 (83)
Products and version ranges known to be affected.
advisories (2)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2024-3360Cisco IP Phone: Mehrere SchwachstellenDeutsch2024-11-06csaf · cert_bundDE
Ein entfernter Angreifer kann mehrere Schwachstellen in Cisco IP Phone ausnutzen, um Informationen offenzulegen oder einen Cros-Site-Scripting-Angriff durchzuführen.
- cisco-sa-mpp-xss-8tAV2TvFCisco 6800, 7800, 8800, and 9800 Series Phones with Multiplatform Firmware Stored Cross-Site Scripting Vulnerabilities2024-11-06csaf · cisco_csafUS
Multiple vulnerabilities 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. These vulnerabilities exist because the web UI of an affected device does not properly validate user-supplied input. An attacker could exploit these vulnerabilities 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 these vulnerabilities, Web Access must be enabled on the phone and the attacker must have Admin credentials on the device. Web Access is disabled by default. Cisco has released software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities.
also known as (4)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (5)
External citations — patches, advisories, analysis.
- https://nvd.nist.gov/vuln/detail/CVE-2024-20533cnnvd
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-mpp-xss-8tAV2TvFcnnvd
- https://vigilance.fr/vulnerability/Cisco-Phones-Cross-Site-Scripting-dated-06-11-2024-45549cnnvd
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-mpp-xss-8tAV2TvFenisa_euvd
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-mpp-xss-8tAV2TvFVendor Advisorynvd
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