CVE-2022-24880 (GCVE-0-2022-24880)

Vulnerability from cvelistv5 – Published: 2022-04-25 22:10 – Updated: 2025-04-23 18:32
VLAI?
Title
Potential Captcha Validate Bypass in flask-session-captcha
Summary
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.
Severity ?
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CWE
  • CWE-253 - Incorrect Check of Function Return Value
  • CWE-394 - Unexpected Status Code or Return Value
  • CWE-754 - Improper Check for Unusual or Exceptional Conditions
Assigner
References
Impacted products
Vendor Product Version
Tethik flask-session-captcha Affected: < 1.2.1
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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