What’s Vulnerable › Vulnerabilities

CVE-2021-31540

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-04-23 · updated 2026-06-17
• Weakness: CWE-732

Description

Wowza Streaming Engine through 4.8.5 (in a default installation) has incorrect file permissions of configuration files in the conf/ directory. A regular local user is able to read and write to all the configuration files, e.g., modify the application server configuration.

Affected products

• Wowza Streaming Engine: through 4.8.5

References

• https://www.gruppotim.it/redteam
• https://www.wowza.com/docs/wowza-streaming-engine-4-8-12-release-notes
• https://www.wowza.com/products/streaming-engine
• https://www.gruppotim.it/redteam
• https://www.wowza.com/docs/wowza-streaming-engine-4-8-12-release-notes
• https://www.wowza.com/products/streaming-engine

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