CVE-2024-20534 Cisco IP Phone 6800, 7800, 8800, and 9800 Series with Multiplatform Firmware Stored Cross-Site Scripting Vulnerability
Authenticated attackers can inject malicious scripts into Cisco IP Phone web UIs, enabling code execution or data theft if Web Access is enabled.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2024-20534?
CVE-2024-20534 is a medium-severity cross-site scripting vulnerability in Cisco IP Phones with Multiplatform Firmware, published on 6 Nov 2024. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-79
Which versions are affected by CVE-2024-20534?
It affects 23 products.
Products include Cisco Desk Phone 9841 With Multiplatform Firmware, Cisco Desk Phone 9851 With Multiplatform Firmware, Cisco Desk Phone 9861 With Multiplatform Firmware, Cisco Desk Phone 9871 With Multiplatform Firmware, Cisco Ip Phone 6821 With Multiplatform Firmware, Cisco Ip Phone 6841 With Multiplatform Firmware and 17 more.
How do I fix CVE-2024-20534?
No fix has been published for CVE-2024-20534 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2024-20534 being exploited?
There is no known exploitation of CVE-2024-20534 in the wild and no public exploit code.
Other vulnerabilities in Cisco IP Phones with Multiplatform Firmware
Sources
Also known as GHSA-47cf-pjqq-7626.