PyPi: Flask-Session-Captcha

CVE-2022-24880

Safety vulnerability ID: 48277

This vulnerability was reviewed by experts

The information on this page was manually curated by our Cybersecurity Intelligence Team.

Created at Apr 25, 2022 Updated at Oct 17, 2024
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Advisory

Flask-session-captcha 1.2.1 includes a fix for CVE-2022-24880: In versions prior to 1.2.1, the 'captcha.validate()' function would return 'None' if passed no value (e.g. by submitting an having an empty form). If implementing users were checking the return value to be **False**, the captcha verification check could be bypassed. Users can workaround the issue by not explicitly checking that the value is False. Checking the return value less explicitly should still work.
https://github.com/Tethik/flask-session-captcha/security/advisories/GHSA-7r87-cj48-wj45

Affected package

flask-session-captcha

Latest version: 1.5.0

Captcha implementation for flask and flask-session.

Affected versions

Fixed versions

Vulnerability changelog

flask-session-captcha is a package which allows users to extend Flask by adding an image based captcha stored in a server side session. In versions prior to 1.2.1, he `captcha.validate()` function would return `None` if passed no value (e.g. by submitting an having an empty form). If implementing users were checking the return value to be **False**, the captcha verification check could be bypassed. Version 1.2.1 fixes the issue. Users can workaround the issue by not explicitly checking that the value is False. Checking the return value less explicitly should still work. See CVE-2022-24880.


CONFIRM:https://github.com/Tethik/flask-session-captcha/security/advisories/GHSA-7r87-cj48-wj45: https://github.com/Tethik/flask-session-captcha/security/advisories/GHSA-7r87-cj48-wj45
MISC:https://github.com/Tethik/flask-session-captcha/commit/2811ae23a38d33b620fb7a07de8837c6d65c13e4: https://github.com/Tethik/flask-session-captcha/commit/2811ae23a38d33b620fb7a07de8837c6d65c13e4
MISC:https://github.com/Tethik/flask-session-captcha/pull/27: https://github.com/Tethik/flask-session-captcha/pull/27
MISC:https://github.com/Tethik/flask-session-captcha/releases/tag/v1.2.1: https://github.com/Tethik/flask-session-captcha/releases/tag/v1.2.1

Resources

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Severity Details

CVSS Base Score

MEDIUM 5.3

CVSS v3 Details

MEDIUM 5.3
Attack Vector (AV)
NETWORK
Attack Complexity (AC)
LOW
Privileges Required (PR)
NONE
User Interaction (UI)
NONE
Scope (S)
UNCHANGED
Confidentiality Impact (C)
NONE
Integrity Impact (I)
LOW
Availability Availability (A)
NONE

CVSS v2 Details

MEDIUM 5.0
Access Vector (AV)
NETWORK
Access Complexity (AC)
LOW
Authentication (Au)
NONE
Confidentiality Impact (C)
NONE
Integrity Impact (I)
PARTIAL
Availability Impact (A)
NONE