CVE-2016-20034

Wowza Streaming Engine cross-site request forgery (CSRF)

8.8 HIGHPublic exploitEPSS 0.21%

Published16 Mar 2026

Description

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.

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredLow

User interactionNone

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Affected products

Wowza Streaming Engine4.5.0

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

https://www.exploit-db.com/exploits/40133ExploitThird Party AdvisoryVDB Entry
https://www.vulncheck.com/advisories/wowza-streaming-engine-privilege-escalation-via-user-editThird Party Advisory
http://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5340.phpExploitThird Party Advisory

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2016-20034 being actively exploited?

CVE-2016-20034 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.21%.

How severe is CVE-2016-20034?

CVE-2016-20034 has a CVSS 3.1 base score of 8.8, rated high. EPSS estimates a 0.21% probability of exploitation.

Which products are affected by CVE-2016-20034?

Affected products include Wowza Streaming Engine.

How do I fix CVE-2016-20034?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2016-20034 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.