CVE-2021-32837

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

28.87% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 97.9% 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

No Red Hat rating. Red Hat rates the CVEs that affect its products.

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

2023-01-17 00:00Z3 YR AGO

Last updated

2025-12-22 01:32Z10 MO AGO

Reserved

2021-05-12

Assigning CNA

GitHub_M

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-1333Inefficient Regular Expression ComplexityBase

Data version

5.2

Document digest

2d0cb2245706e504fbe0fc0c90f3cb919f752a34e7930ef6c6facb639e402f47

• securitylab.github.comhttps://securitylab.github.com/advisories/GHSL-2021-108-python-mechanize-mechanize/
• github.comhttps://github.com/python-mechanize/mechanize/blob/3acb1836f3fd8edc5a758a417dd46b53832ae3b5/mechanize/_urllib2_fork.py#L878-L879
• github.comhttps://github.com/python-mechanize/mechanize/releases/tag/v0.4.6
• github.comhttps://github.com/python-mechanize/mechanize/commit/dd05334448e9f39814bab044d2eaa5ef69b410d6
• lists.debian.org[debian-lts-announce] 20230620 [SECURITY] [DLA 3460-1] python-mechanize security updatehttps://lists.debian.org/debian-lts-announce/2023/06/msg00022.htmlmailing-list
• lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/12/msg00028.html