What is CVE-2021-41250?

CVE-2021-41250 is a medium-severity vulnerability in Python-Discord Bot, classified under Improper Input Validation. CVSS score: 4.3/10. Published 2021-11-05.

How severe is CVE-2021-41250?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Improper input validation in Python-Discord Bot

CVE-2021-41250

Python discord bot is the community bot for the Python Discord community. In affected versions when a non-blacklisted URL and an otherwise triggering filter token is included in the same message the token filter does not trigger. This means that by including any non-blacklisted URL moderation filters can be bypassed. This issue has been resolved in commit 67390298852513d13e0213870e50fb3cff1424e0

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2021-11-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.008 (53.9th percentile), scored 2026-10-07.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 53.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Python-Discord Bot — versions < 67390298852513d13e0213870e50fb3cff1424e0
Pythondiscord Bot

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

github.com/python-discord/bot/security/advisories/GHSA-j8c3-8x46-8pp6 (Patch, Third Party Advisory)
github.com/python-discord/bot/commit/67390298852513d13e0213870e50fb3cff1424e0 (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-41250?: CVE-2021-41250 is a medium-severity vulnerability in Python-Discord Bot, classified under Improper Input Validation. CVSS score: 4.3/10. Published 2021-11-05.
How severe is CVE-2021-41250?: Medium severity. CVSS v3 base score is 4.3 out of 10.