CVE-2021-43331

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

1.28% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 68.1% of scored records. A rank, not a probability.

NVD base score

6.1 (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:C/C:L/I:L/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

2021-11-12 20:44Z4 YR AGO

Last updated

2024-08-04 03:55Z2 YR AGO

Reserved

2021-11-03

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')Base

Data version

5.1

Document digest

c5d6db7184edd4857a5c24f6e9b2a6ee54bb38199e953ef39c2ee249e1a9a7fa

• bugs.launchpad.nethttps://bugs.launchpad.net/mailman/+bug/1949401x_refsource_MISC
• mail.python.orghttps://mail.python.org/archives/list/mailman-announce%40python.org/message/I2X7PSFXIEPLM3UMKZMGOEO3UFYETGRL/x_refsource_CONFIRM
• lists.debian.org[debian-lts-announce] 20220609 [SECURITY] [DLA 3049-1] mailman security updatehttps://lists.debian.org/debian-lts-announce/2022/06/msg00011.htmlmailing-listx_refsource_MLIST