CSRF in Wowza Streaming Engine
CVE-2016-20034
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.
Vulnerability class: CSRF (Cross-Site Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (9.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 10th percentile — 9.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Wowza Streaming Engine — versions 4.5.0
- Wowza Media Systems, Llc. Streaming Engine — versions 4.5.0
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/40133 (Exploit, VDB Entry, Third Party Advisory, exploit)
- www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5340.php (Exploit, vendor-advisory, Third Party Advisory)
- www.vulncheck.com/advisories/wowza-streaming-engine-privilege-escalation-via-us… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2016-20034?
- CVE-2016-20034 is a high-severity vulnerability in Wowza Streaming Engine, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.8/10. Published 2026-03-16.
- How severe is CVE-2016-20034?
- High severity. CVSS v3 base score is 8.8 out of 10.