CVE-2020-5390
PySAML2 before 5.0.0 does not check that the signature in a SAML document is enveloped and thus signature wrapping is effective, i.e., it is affected by XML Signature Wrapping (XSW). The signature
02 Description
PySAML2 before 5.0.0 does not check that the signature in a SAML document is enveloped and thus signature wrapping is effective, i.e., it is affected by XML Signature Wrapping (XSW). The signature
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 1.23% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 68.7% of scored records. A rank, not a probability.
- NVD base score
- 7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Important. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2020-01-13 18:11Z6 YR AGO
- Last updated
- 2024-08-04 08:30Z2 YR AGO
- Reserved
- 2020-01-03
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-347Improper Verification of Cryptographic SignatureBase
- Data version
- 5.1
- Document digest
- affe3bb3f9aeac7150b85bdeb6ac3b8760685144dc99f24811415ff250a29464
05 Affected products
06 References
- github.comhttps://github.com/IdentityPython/pysaml2/commit/5e9d5acbcd8ae45c4e736ac521fd2df5b1c62e25
- github.comhttps://github.com/IdentityPython/pysaml2/commit/f27c7e7a7010f83380566a219fd6a290a00f2b6e
- github.comhttps://github.com/IdentityPython/pysaml2/releases/tag/v5.0.0
- github.comhttps://github.com/IdentityPython/pysaml2/releases
- pypi.orghttps://pypi.org/project/pysaml2/5.0.0/
- usn.ubuntu.comUSN-4245-1https://usn.ubuntu.com/4245-1/
- www.debian.orgDSA-4630https://www.debian.org/security/2020/dsa-4630
- lists.debian.org[debian-lts-announce] 20200226 [SECURITY] [DLA 2119-1] python-pysaml2 security updatehttps://lists.debian.org/debian-lts-announce/2020/02/msg00025.html
07 Fixed in
Debian 12
- python-pysaml2 Fixed in 4.5.0-7
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- python-pysaml2 Fixed in 4.5.0-7
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- python-pysaml2 Fixed in 4.5.0-7
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- python-pysaml2 Fixed in 3.0.0-3ubuntu1.16.04.4
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- python-pysaml2 Fixed in 4.0.2-0ubuntu3.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.