CVE-2022-24880

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.

Affected Software

VendorProductVersion RangeStatus
Tethikflask-session-captcha< 1.2.1affected

Weaknesses

  • CWE-253: CWE-253: Incorrect Check of Function Return Value
  • CWE-394: CWE-394: Unexpected Status Code or Return Value
  • CWE-754: CWE-754: Improper Check for Unusual or Exceptional Conditions

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: yes
    • Technical Impact: partial

References