CRITICAL
The sample web application in web2py before 2.14.2 might allow remote attackers to execute arbitrary code via vectors involving use of a hardcoded encryption key when calling the session.connect function
Published Feb 6, 2018
9.8
CRITICALCVSS 3.1
EPSS 3.34%
Description
The sample web application in web2py before 2.14.2 might allow remote attackers to execute arbitrary code via vectors involving use of a hardcoded encryption key when calling the session.connect function.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
9.8 CRITICAL GHSA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact High
Integrity Impact High
Availability Impact High
9.8 CRITICAL NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact High
Integrity Impact High
Availability Impact High
7.5 HIGH NVD
AV:N/AC:L/Au:N/C:P/I:P/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
3.34% 0.03340
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.03340
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (18 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.34% (0.03340) | 88.25th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.38% (0.03376) | 87.16th | v5 (v2026.06.15) |
| May 18, 2025 | 1.84% (0.01836) | 82.02th | v4 (v2025.03.14) |
| Mar 30, 2025 | 0.81% (0.00815) | 72.08th | v4 (v2025.03.14) |
| Mar 29, 2025 | 3.56% (0.03564) | 79.28th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.81% (0.00815) | 72.62th | v4 (v2025.03.14) |
| Dec 17, 2024 | 3.78% (0.03783) | 91.72th | v3 (v2023.03.01) |
| Jan 17, 2024 | 2.06% (0.02059) | 87.82th | v3 (v2023.03.01) |
| Dec 17, 2023 | 2.26% (0.02263) | 88.43th | v3 (v2023.03.01) |
| Sep 2, 2023 | 2.42% (0.02415) | 88.56th | v3 (v2023.03.01) |
| Jul 21, 2023 | 1.95% (0.01949) | 87.12th | v3 (v2023.03.01) |
| Jun 30, 2023 | 2.42% (0.02415) | 88.40th | v3 (v2023.03.01) |
| May 8, 2023 | 2.63% (0.02634) | 88.74th | v3 (v2023.03.01) |
| Mar 7, 2023 | 2.08% (0.02080) | 87.29th | v3 (v2023.03.01) |
| Mar 6, 2023 | 5.79% (0.05785) | 90.41th | v2 (v2022.01.01) |
| Nov 3, 2022 | 5.79% (0.05785) | 90.13th | v2 (v2022.01.01) |
| Apr 1, 2022 | 5.63% (0.05634) | 89.29th | v2 (v2022.01.01) |
| Feb 4, 2022 | 5.63% (0.05634) | 76.84th | v2 (v2022.01.01) |
Weaknesses (1)
References (7)
- https://devco.re/blog/2017/01/03/web2py-unserialize-code-execution-CVE-2016-3957/ x_refsource_MISCExploitTechnical DescriptionThird Party Advisory
- https://github.com/advisories/GHSA-q2rq-qgcf-m22w Advisory
- https://github.com/web2py/web2py/blob/R-2.14.1/applications/examples/models/session.py x_refsource_MISCThird Party Advisory
- https://github.com/web2py/web2py/commit/9706d125b42481178d2b423de245f5d2faadbf40
- https://github.com/web2py/web2py/issues/1205
- https://nvd.nist.gov/vuln/detail/CVE-2016-3953
- https://usn.ubuntu.com/4030-1/ vendor-advisoryx_refsource_UBUNTU
| Link | Providers | Tags |
|---|---|---|
| https://devco.re/blog/2017/01/03/web2py-unserialize-code-execution-CVE-2016-3957/ | x_refsource_MISCExploitTechnical DescriptionThird Party Advisory | |
| https://github.com/advisories/GHSA-q2rq-qgcf-m22w | Advisory | |
| https://github.com/web2py/web2py/blob/R-2.14.1/applications/examples/models/session.py | x_refsource_MISCThird Party Advisory | |
| https://github.com/web2py/web2py/commit/9706d125b42481178d2b423de245f5d2faadbf40 | ||
| https://github.com/web2py/web2py/issues/1205 | ||
| https://nvd.nist.gov/vuln/detail/CVE-2016-3953 | ||
| https://usn.ubuntu.com/4030-1/ | vendor-advisoryx_refsource_UBUNTU |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Feb 6, 2018
Updated Aug 6, 2024
Reserved Apr 5, 2016
Link CVE-2016-3953
CISA Vulnrichment
GHSA-Q2RQ-QGCF-M22W Updated n/a