pysaml2 Improper Authentication vulnerability
pysaml2 version 4.4.0 and older accept any password when run with python optimizations enabled. This allows attackers to log in as any user without knowing their password.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | pysaml2 | < 4.5.0 | 4.5.0 |
References
- https://github.com/rohe/pysaml2/issues/451
- https://security.gentoo.org/glsa/201801-11
- https://lists.debian.org/debian-lts-announce/2018/07/msg00000.html
- https://lists.debian.org/debian-lts-announce/2021/02/msg00038.html
- https://github.com/advisories/GHSA-924m-4pmx-c67h
- https://nvd.nist.gov/vuln/detail/CVE-2017-1000433
- https://github.com/IdentityPython/pysaml2/pull/454
- https://github.com/IdentityPython/pysaml2/commit/6312a41e037954850867f29d329e5007df1424a5
- https://github.com/pypa/advisory-database/tree/main/vulns/pysaml2/PYSEC-2018-48.yaml
- https://github.com/rohe/pysaml2
- CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H- Weakness (CWE)
CWE-287- Platform
- Python (PyPI)
- Package
pysaml2- Disclosed
- 02.01.2018
- Updated
- 11.10.2026 11:20
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2018-48 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-924m-4pmx-c67h - CC BY 4.0
Vulnerability history: pysaml2
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 7
- First → latest
- 03.2017 01.2021
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 2
- High 2
- Medium 3
Disclosures per year
- 2017: 3
- 2018: 1
- 2019: 0
- 2020: 1
- 2021: 2
- 2022: 0
- 2023: 0
- 2024: 0
- 2025: 0
- 2026: 0
-
pysaml2 Improper Authentication vulnerability this entry
Know which vulnerabilities affect your application
With the DockRay integration and software inventory enabled, DockRay checks reported component versions against known vulnerabilities and notifies you about confirmed matches. Coverage depends on the supported technology and available advisory data.