A remote authenticated authorization-bypass vulnerability in Wowza Streaming Engine 4.8.0 and earlier allows any read-only user to issue re…

published 2020-04-14 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-29835

cvss: 8.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 3.5%; EPSS 3.5% chance of exploitation in 30 days, percentile 89%
public exploits: 0; none known

A remote authenticated authorization-bypass vulnerability in Wowza Streaming Engine 4.8.0 and earlier allows any read-only user to issue requests to the administration panel in order to change functionality. For example, a read-only user may activate the Java JMX port in unauthenticated mode and execute OS commands under root privileges. This issue was resolved in Wowza Streaming Engine 4.8.5.

Exploit prediction

3.53% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/DrunkenShells/Disclosures/tree/master/CVE-2020-9004-Authenticated%20Remote%20Authorization%20Bypass%20Leading%20to%20RCE-Wowza referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	9.0	AV:N/AC:L/Au:S/C:C/I:C/A:C

Classification

Weakness

CWE-306 Missing Authentication for Critical Functionality

References

github.com /DrunkenShells/Disclosures/tree/master/CVE-2020-9004-Authenticated%20Remote%20Authorization%20Bypass%20Leading
exploit, third-party-advisory
wowza.com /docs/wowza-streaming-engine-4-8-5-release-notes
release-notes, vendor-advisory
raw.githubusercontent.com /WowzaMediaSystems/public_cve/main/wowza-streaming-engine/CVE-2020-9004.txt
third-party-advisory

Sources

CVE List CVE-2020-9004
NVD CVE-2020-9004

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary