XSS in Cisco Ip Phones With Multiplatform Firmware
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (22.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 22.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- Cisco Ip Phones With Multiplatform Firmware — versions 11.1.2, 11.2.1, 11.2.3
- Cisco Session Initiation Protocol (Sip) Software — versions 3.1(1), 3.0(1), 3.1(1)SR1
- Cisco Desk Phone 9841
- Cisco Desk Phone 9841 With Multiplatform Firmware — versions 3.1(1), 3.1\(1\)
- Cisco Desk Phone 9851
- Cisco Desk Phone 9851 With Multiplatform Firmware — versions 3.1(1), 3.1\(1\)
- Cisco Desk Phone 9861
- Cisco Desk Phone 9861 With Multiplatform Firmware — versions 3.1(1), 3.1\(1\)
- Cisco Desk Phone 9871
- Cisco Desk Phone 9871 With Multiplatform Firmware — versions 3.1(1), 3.1\(1\)
Weakness classification (CWE)
Public proof-of-concept exploits
References
Frequently asked questions
- What is CVE-2024-20534?
- CVE-2024-20534 is a medium-severity vulnerability in Cisco Ip Phones With Multiplatform Firmware, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2024-11-06.
- How severe is CVE-2024-20534?
- Medium severity. CVSS v3 base score is 4.8 out of 10.
- Is CVE-2024-20534 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.