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CVE-2024-20534

MEDIUMCVSS 4.8/10EPSS 0.27%

Last modified

CVE-2024-20534 is a medium-severity vulnerability rated 4.8/10 on the CVSS scale. 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. EPSS estimates a 0.27% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
4.8/10

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

EPSS Probability
0.27%

18.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersionsUpdate
CiscoDesk Phone 9841 With Multiplatform Firmware3.1\(1\)—
CiscoDesk Phone 9851 With Multiplatform Firmware3.1\(1\)—
CiscoDesk Phone 9861 With Multiplatform Firmware3.1\(1\)—
CiscoDesk Phone 9871 With Multiplatform Firmware3.1\(1\)—
CiscoIp Phone 6821 With Multiplatform Firmware12.0\(5\)Sr1
CiscoIp Phone 6841 With Multiplatform Firmware12.0\(5\)Sr1
CiscoIp Phone 6851 With Multiplatform Firmware12.0\(5\)Sr1
CiscoIp Phone 6861 With Multiplatform Firmware12.0\(5\)Sr1
CiscoIp Phone 6871 With Multiplatform Firmware12.0\(5\)Sr1
CiscoIp Phone 7811 With Multiplatform Firmware12.0\(5\)Sr1
CiscoIp Phone 7821 With Multiplatform Firmware12.0\(5\)Sr1
CiscoIp Phone 7832 With Multiplatform Firmware12.0\(5\)Sr1
CiscoIp Phone 7841 With Multiplatform Firmware12.0\(5\)Sr1
CiscoIp Phone 7861 With Multiplatform Firmware12.0\(5\)Sr1
CiscoIp Phone 8811 With Multiplatform Firmware12.0\(5\)Sr1
CiscoIp Phone 8832 With Multiplatform Firmware12.0\(5\)Sr1
CiscoIp Phone 8841 With Multiplatform Firmware12.0\(5\)Sr1
CiscoIp Phone 8845 With Multiplatform Firmware12.0\(5\)Sr1
CiscoIp Phone 8851 With Multiplatform Firmware12.0\(5\)Sr1
CiscoIp Phone 8861 With Multiplatform Firmware12.0\(5\)Sr1
CiscoIp Phone 8865 With Multiplatform Firmware12.0\(5\)Sr1
CiscoVideo Phone 8875 With Multiplatform Firmware< 2.3\(1\)—
CiscoVideo Phone 8875 With Multiplatform Firmware2.3\(1\)—
CiscoIp Phone 8831 With Multiplatform FirmwareAll versions—

References

Timeline

Published
Last Modified
Status
Analyzed

Frequently Asked Questions

What is CVE-2024-20534?
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.
How severe is CVE-2024-20534?
CVE-2024-20534 has a CVSS score of 4.8/10 (MEDIUM severity). The EPSS model estimates a 0.27% probability of exploitation in the next 30 days.
How do I fix CVE-2024-20534?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2024-20534?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST