What’s Vulnerable › Vulnerabilities

CVE-2016-3952

• Severity: high (CVSS 7.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-02-06 · updated 2026-06-17
• Weakness: CWE-255

Description

web2py before 2.14.1, when using the standalone version, allows remote attackers to obtain environment variable values via a direct request to examples/template_examples/beautify. NOTE: this issue can be leveraged by remote attackers to gain administrative access.

Affected products

• web2py: before 2.14.1 — fixed in 2.14.1

How to fix

Upgrade to a fixed version: web2py 2.14.1. Check the vendor advisory for mitigations.

References

• https://devco.re/blog/2017/01/03/web2py-unserialize-code-execution-CVE-2016-3957/
• https://github.com/web2py/web2py/commit/9706d125b42481178d2b423de245f5d2faadbf40
• https://usn.ubuntu.com/4030-1/
• https://devco.re/blog/2017/01/03/web2py-unserialize-code-execution-CVE-2016-3957/
• https://github.com/web2py/web2py/commit/9706d125b42481178d2b423de245f5d2faadbf40
• https://usn.ubuntu.com/4030-1/

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