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CVE-2023-33175 — Vulnerability in toui — CVE Details

CRITICAL

toui allows user-specific variables to be shared between users

Published June 29, 2026Updated July 1, 2026Source: osv

Summary

### Impact Websites that use `Website.user_vars` property in versions. ### Patches It affects versions v2.0.1 to v2.4.0. Please upgrade to v2.4.1 ### Workarounds Do not use `Website.user_vars` in websites when using versions v2.0.1 to v2.4.0. Also, do not use `Website.signin_user()` in version v2.4.0 only. ### Explanation ToUI is using Flask-Caching (SimpleCache) to store user variables. My misunderstanding was that these caches are stored in the client's browser, but it seems that these are stored in the server side.

Advisory Timeline

  • First published June 29, 2026 (105 days ago).
  • Last revised July 1, 2026 — 2 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

pip
Update toui to 2.4.1 or later
pip install "toui>=2.4.1"

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: PyPI (1).

PackageEcosystemAffectedFixed In
toui
PyPI
2.0.1, 2.1.0, 2.1.1, 2.2.0 (+2 more)2.4.1

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.1 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

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

References

Frequently Asked Questions

What is CVE-2023-33175?
toui allows user-specific variables to be shared between users This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 9.1/10).
How do I check if my project is affected by CVE-2023-33175?
CVE-2023-33175 affects toui. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2023-33175 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
9.1

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

PYSEC-2026-555
GHSA-hh7j-pg39-q563

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