CVE-2016-20034

HIGH 8.8

Wowza Streaming Engine 4.5.0 Privilege Escalation via user edit

CVSS Score

8.8

EPSS Score

0.0%

EPSS Percentile

0th

Wowza Streaming Engine 4.5.0 contains a privilege escalation vulnerability that allows authenticated read-only users to elevate privileges to administrator by manipulating POST parameters. Attackers can send POST requests to the user edit endpoint with accessLevel set to 'admin' and advUser parameters set to 'true' and 'on' to gain administrative access.

CWE	CWE-352
Vendor	wowza media systems, llc.
Product	wowza streaming engine
Published	Mar 15, 2026
Last Updated	Mar 16, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

Wowza Media Systems, LLC. / Wowza Streaming Engine

4.5.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

exploit-db.com: https://www.exploit-db.com/exploits/40133 zeroscience.mk: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5340.php vulncheck.com: https://www.vulncheck.com/advisories/wowza-streaming-engine-privilege-escalation-via-user-edit

Credits

LiquidWorm as Gjoko Krstic of Zero Science Lab