CVE-2025-8546

atjiu pybbs Verification Code login Captcha

State: Published
Severity: 6.9 Medium
Published: Aug 5, 2025
Updated: Aug 5, 2025
Reserved: Aug 4, 2025

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	6.9 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P	VulDB
3.1	5.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C	VulDB
3.0	5.3 Medium	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C	VulDB
2.0	5.0 Medium	AV:N/AC:L/Au:N/C:P/I:N/A:N/E:POC/RL:OF/RC:C	VulDB

Weaknesses

CWE-804 Guessable CAPTCHA
CWE-287 Improper Authentication

Affected Products

Product	Versions
pybbsatjiu	6.0Affected

References

VDB-318675 | atjiu pybbs Verification Code login Captchavdb-entrytechnical-description
VDB-318675 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
Submit #622179 | atjiu https://github.com/atjiu/pybbs <=6.0.0 CAPTCHA reuse Vulnerabilitythird-party-advisory
https://github.com/atjiu/pybbs/issues/199issue-tracking
https://github.com/atjiu/pybbs/issues/199#issuecomment-3134573731issue-tracking
https://github.com/atjiu/pybbs/issues/199#issue-3256276118exploitissue-tracking
https://github.com/atjiu/pybbs/commit/ecaf8d46944fd03e3c4ea05698f8acf0aaa570cfpatch

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