CVE-2016-20035Public exploitNetwork attack vector

Administrator account creation via unchecked cross-origin POST

Published Mar 15, 2026 · Updated Mar 15, 2026

Cross-site request forgery in Wowza Streaming Engine 4.5.0 allows remote attackers to create administrator accounts through a malicious web page. The user-edit handler accepts a cross-origin POST carrying action=new, chosen credentials, and accessLevel=admin without validating request authenticity. A logged-in administrator must visit attacker-controlled content while the Manager session is active, after which the new account has administrative access.

CVSS severity6.9
Medium
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site request forgery in Wowza Streaming Engine 4.5.0 allows remote attackers to create administrator accounts through a malicious web page. The user-edit handler accepts a cross-origin POST carrying action=new, chosen credentials, and accessLevel=admin without validating request authenticity. A logged-in administrator must visit attacker-controlled content while the Manager session is active, after which the new account has administrative access.

The record

CVE
CVE-2016-20035
Published
Mar 15, 2026
Updated
Mar 15, 2026
Vendor
Wowza Media Systems
Product
Wowza Streaming Engine
Classifications
CWE-352, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Wowza Media Systems · Wowza Streaming Engineversion=4.5.0

Published CVSS scores

4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
5.3VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
6.9VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)
T1189Drive-by Compromise

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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