CVE-2016-3957
9.8
CRITICAL · CVSS 3.0 · EPSS 4.9% (pctl 92)
In your normal cycle
Critical by CVSS (9.8), but no sign of active exploitation.
Description
The secure_load function in gluon/utils.py in web2py before 2.14.2 uses pickle.loads to deserialize session information stored in cookies, which might allow remote attackers to execute arbitrary code by leveraging knowledge of encryption_key.
Scoring
| CVSS | 9.8 (CRITICAL, v3.0) |
|---|---|
| Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 4.94% — more likely to be exploited than 92% of all CVEs |
| Weakness | CWE-502 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2018-02-06 |
| Last modified | 2026-06-17 |
Affected (1)
| Vendor | Product |
|---|---|
| web2py | web2py |
References
- https://devco.re/blog/2017/01/03/web2py-unserialize-code-execution-CVE-2016-3957/
- https://github.com/web2py/web2py/blob/R-2.14.1/gluon/utils.py#L200
- 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/blob/R-2.14.1/gluon/utils.py#L200
- https://usn.ubuntu.com/4030-1/
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