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CVE-2025-8813— atjiu pybbs IndexController.java changeLanguage redirect

Quick assessment

Affected
atjiu pybbs
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

pybbs是iuiu个人开发者的一个Java开发的社区平台。 pybbs 6.0.0及之前版本存在输入验证错误漏洞，该漏洞源于文件src/main/java/co/yiiu/pybbs/controller/front/IndexController.java中函数changeLanguage参数referer导致开放重定向，可能导致远程攻击。

CVSS 3.5 · Low EPSS 0.30% · P21

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise
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I. Basic Information for CVE-2025-8813

Vulnerability Information
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Vulnerability Title
atjiu pybbs IndexController.java changeLanguage redirect
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
Source: CVE Program / CVE List V5
Vulnerability Title
pybbs 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
pybbs是iuiu个人开发者的一个Java开发的社区平台。 pybbs 6.0.0及之前版本存在输入验证错误漏洞，该漏洞源于文件src/main/java/co/yiiu/pybbs/controller/front/IndexController.java中函数changeLanguage参数referer导致开放重定向，可能导致远程攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
atjiu pybbs 6.0 -

II. Public POCs for CVE-2025-8813

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III. Intelligence Information for CVE-2025-8813

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Proof of Concept for CVE-2025-8813 (1)

Other References for CVE-2025-8813 (1)

Same Patch Batch · atjiu · 2025-08-10 · 3 CVEs total

CVE-2025-8814 4.3 MEDIUM atjiu pybbs CookieUtil.java setCookie cross-site request forgery
CVE-2025-8812 2.4 LOW atjiu pybbs Admin Panel settings cross site scripting

IV. Related Vulnerabilities

Same product: pybbs
Same vendor: atjiu
Same weakness: CWE-601

V. Comments for CVE-2025-8813

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