CVE-2021-23437

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

3.24% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 88.2% 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:N/A:H

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

2021-09-03 16:10Z5 YR AGO

Last updated

2024-09-16 20:47Z2 YR AGO

Reserved

2021-01-08

Assigning CNA

snyk

Record state

PUBLISHED

Severity

High (CVSS 7.5)

CNA CVSS vector

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

Weaknesses

• CWE-125Out-of-bounds ReadBase
• CWE-400Uncontrolled Resource ConsumptionClass

Data version

5.1

Document digest

e2d929ae5b3501020bd9c15f2842d3831d71b224118645fdebbedb27a9441de2

• snyk.iohttps://snyk.io/vuln/SNYK-PYTHON-PILLOW-1319443
• pillow.readthedocs.iohttps://pillow.readthedocs.io/en/stable/releasenotes/8.3.2.html
• github.comhttps://github.com/python-pillow/Pillow/commit/9e08eb8f78fdfd2f476e1b20b7cf38683754866b
• lists.fedoraproject.orgFEDORA-2021-9f020cf155https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VKRCL7KKAKOXCVD7M6WC5OKFGL4L3SJT/vendor-advisory
• lists.fedoraproject.orgFEDORA-2021-cbfaefb390https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RNSG6VFXTAROGF7ACYLMAZNQV4EJ6I2C/vendor-advisory
• security.gentoo.orgGLSA-202211-10https://security.gentoo.org/glsa/202211-10vendor-advisory
• lists.debian.org[debian-lts-announce] 20240322 [SECURITY] [DLA 3768-1] pillow security updatehttps://lists.debian.org/debian-lts-announce/2024/03/msg00021.htmlmailing-list