CVE-2021-21239

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

1.29% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 69.8% of scored records. A rank, not a probability.

NVD base score

6.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. 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.

Published

2021-01-21 14:15Z5 YR AGO

Last updated

2024-08-03 18:09Z2 YR AGO

Reserved

2020-12-22

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

Medium (CVSS 6.5)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Weaknesses

• CWE-347Improper Verification of Cryptographic SignatureBase

Data version

5.1

Document digest

6d0cd5c886de5021984e785a5ed95dd78cc386c3ff1fbc05fd21cd7fd4a5459c

• github.comhttps://github.com/IdentityPython/pysaml2/security/advisories/GHSA-5p3x-r448-pc62x_refsource_CONFIRM
• pypi.orghttps://pypi.org/project/pysaml2x_refsource_MISC
• www.aleksey.comhttps://www.aleksey.com/pipermail/xmlsec/2013/009717.htmlx_refsource_MISC
• github.comhttps://github.com/IdentityPython/pysaml2/releases/tag/v6.5.0x_refsource_MISC
• github.comhttps://github.com/IdentityPython/pysaml2/commit/46578df0695269a16f1c94171f1429873f90ed99x_refsource_MISC
• lists.debian.org[debian-lts-announce] 20210226 [SECURITY] [DLA 2577-1] python-pysaml2 security updatehttps://lists.debian.org/debian-lts-announce/2021/02/msg00038.htmlmailing-listx_refsource_MLIST