A vulnerability, which was classified as problematic, was found in atjiu pybbs up to 6.0.0. This affects the function adminlogin/login of the component Verification Code Handler. The manipulation leads to guessable captcha. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The patch is named ecaf8d46944fd03e3c4ea05698f8acf0aaa570cf. It is recommended to apply a patch to fix this issue.