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Vulnerability record · CVE-2016-3952 · published 6 February 2018

CVE-2016-3952: Web2py vulnerability

WWeb2py · Web2py

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.

7.8 CVSS 3.0 High EPSS 1.1% · top 36.9% CWE-255 · CWE-255
7.8CVSS 3.0 base score, v2 2.1
1.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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.

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://devco.re/blog/2017/01/03/web2py-unserialize-code-execution-CVE-2016-3957/ ExploitTechnical DescriptionThird Party Advisory
https://github.com/web2py/web2py/commit/9706d125b42481178d2b423de245f5d2faadbf40 Third Party Advisory
https://usn.ubuntu.com/4030-1/
https://devco.re/blog/2017/01/03/web2py-unserialize-code-execution-CVE-2016-3957/ ExploitTechnical DescriptionThird Party Advisory
https://github.com/web2py/web2py/commit/9706d125b42481178d2b423de245f5d2faadbf40 Third Party Advisory
https://usn.ubuntu.com/4030-1/

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2023-45158Web2py os command injection vulnerabilityAn OS command injection vulnerability exists in web2py 2.24.1 and earlier. When the product is configured to use notifySendHandler for logging (not t…EPSS 3.7%9.8CVE-2016-3953Web2py hard-coded credentials vulnerabilityThe sample web application in web2py before 2.14.2 might allow remote attackers to execute arbitrary code via vectors involving use of a hardcoded en…EPSS 3.3%9.8CVE-2016-3957Web2py deserialization of untrusted data vulnerabilityThe secure_load function in gluon/utils.py in web2py before 2.14.2 uses pickle.loads to deserialize session information stored in cookies, which migh…EPSS 4.9%9.8CVE-2016-10321Web2py vulnerabilityweb2py before 2.14.6 does not properly check if a host is denied before verifying passwords, allowing a remote attacker to perform brute-force attack…EPSS 2.6%8.8CVE-2016-4808Web2py cross-site request forgery vulnerabilityWeb2py versions 2.14.5 and below was affected by CSRF (Cross Site Request Forgery) vulnerability, which allows an attacker to trick a logged in user …EPSS 1.8%7.5CVE-2016-4806Web2py information exposure vulnerabilityWeb2py versions 2.14.5 and below was affected by Local File Inclusion vulnerability, which allows a malicious intended user to read/access web server…EPSS 10%6.1CVE-2023-22432Web2py open redirect vulnerabilityOpen redirect vulnerability exists in web2py versions prior to 2.23.1. When using the tool, a web2py user may be redirected to an arbitrary website b…EPSS 2.4%6.1CVE-2022-33146Web2py open redirect vulnerabilityOpen redirect vulnerability in web2py versions prior to 2.22.5 allows a remote attacker to redirect a user to an arbitrary web site and conduct a phi…EPSS 1.6%

Source: NIST National Vulnerability Database (record CVE-2016-3952), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.