CVE-2023-53955

Name: CVE-2023-53955
Creator: NVD / NIST
Published: 2025-12-22T22:15:59.98+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.3/10EPSS 0.76%

Last modified Jun 17, 2026

CVE-2023-53955 is a critical-severity vulnerability rated 9.3/10 on the CVSS scale. 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.. EPSS estimates a 0.76% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

9.8/10

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

CVSS 4.0

9.3/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.76%

50.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-639

Affected Software

Vendor	Product	Versions
Sound4	Stream Extension	2.4.29
Sound4	Wm2 Firmware	1.11
Sound4	Big Voice2 Firmware	1.30
Sound4	Big Voice4 Firmware	1.2
Sound4	Pulse Eco Firmware	1.16
Sound4	Impact Eco Firmware	1.16
Sound4	First Firmware	1.69
Sound4	First Firmware	2.15
Sound4	Pulse Firmware	1.69
Sound4	Pulse Firmware	2.15
Sound4	Impact Firmware	1.69
Sound4	Impact Firmware	2.15

References

https://web.archive.org/web/20221207074555/https://www.sound4.com/Product
https://www.exploit-db.com/exploits/51169Exploit, Third Party Advisory, VDB Entry
https://www.vulncheck.com/advisories/sound-impactfirstpulseeco-x-authorization-bypass-via-insecure-object-referencesThird Party Advisory
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2022-5723.phpExploit, Third Party Advisory
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2022-5723.phpExploit, Third Party Advisory

Timeline

Published: Dec 22, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2023-53955?

How severe is CVE-2023-53955?

CVE-2023-53955 has a CVSS score of 9.3/10 (CRITICAL severity). The EPSS model estimates a 0.76% probability of exploitation in the next 30 days.

How do I fix CVE-2023-53955?

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-2023-53955?

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

Scan your code now

Source: NVD / NIST