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🛡️ CVE-2023-33175 — toui

🔴 CVSS 9.5 — Critical ✅ No Known Exploit CWE-913 OSV
9.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

toui allows user-specific variables to be shared between users

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.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability none.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

  • Attack vector: Network — reachable from anywhere that can route to the service.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: None — an unauthenticated stranger can try it.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: High — total loss, or loss the attacker controls.
  • Integrity impact: High — total loss, or loss the attacker controls.
  • Availability impact: None.

Weakness class

CVE-2023-33175 is classified as CWE-913: Improper Control of Dynamically-Managed Code Resources. Attacker input reaches variables, objects or code that the runtime manages dynamically.

Affected software

CVE-2023-33175 is recorded against 1 package.

  • toui (from 2.0.1 up to 2.4.1)

Timeline and source

Published on 29 June 2026 and last revised on 1 July 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

github.com (Web)
nvd.nist.gov (Advisory)
github.com (Package)
github.com (Web)
pypi.org (Package)
github.com (Advisory)

Same weakness in other software

These advisories are the same class of weakness (CWE-913: Improper Control of Dynamically-Managed Code Resources) in other software:

Details

Severity CRITICAL
CVSS Score 9.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CWE CWE-913
Public Exploit ✅ No
Source OSV
Published 2026-06-29
Updated 2026-08-20
Modified 2026-07-01
Fix URL N/A

Affected Packages

Software From version Fixed in
toui 2.0.1 2.4.1

Exploit Protection

Are you running toui?

CVE-2023-33175 carries CVSS 9.5 Critical rating. BotEraser checks your installation against this and other known CVE records, and blocks IPs associated with exploit activity.

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ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

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