Auth bypass in Kantar Media Wm2
CVE-2023-53955
SOUND4 IMPACT/FIRST/PULSE/Eco v2.x contains an insecure direct object reference vulnerability that allows attackers to bypass authorization and access hidden system resources. Attackers can exploit the vulnerability by manipulating user-supplied input to execute privileged functionalities without proper authentication.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.009 (57.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 57.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
- Kantar Media Wm2 — versions 1.11
- Sound4 Big Voice2
- Sound4 Big Voice2 Firmware — versions 1.30
- Sound4 Big Voice4
- Sound4 Big Voice4 Firmware — versions 1.2
- Sound4 First — versions 1.0, 2.0
- Sound4 First Firmware — versions 1.69, 2.15
- Sound4 Impact — versions 1.0, 2.0
- Sound4 Impact Eco
- Sound4 Impact Eco Firmware — versions 1.16
Weakness classification (CWE)
References
- ExploitDB-51169 (Exploit, exploit, Third Party Advisory, VDB Entry)
- SOUND4 Official Product Homepage (Product, product)
- Zero Science Lab Disclosure (ZSL-2022-5723) (Exploit, Third Party Advisory, third-party-advisory)
- VulnCheck Advisory: SOUND4 IMPACT/FIRST/PULSE/Eco v2.x Authorization Bypass via Insecure Object References (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2023-53955?
- CVE-2023-53955 is a critical-severity vulnerability in Kantar Media Wm2, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 9.8/10. Published 2025-12-22.
- How severe is CVE-2023-53955?
- Critical severity. CVSS v3 base score is 9.8 out of 10.