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CVE-2026-124505— Dianping CAT Login/Logout Handler.java Handler.redirect

Quick assessment

Affected
Dianping CAT
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.

在大众点评 CAT 3.0.0、3.1.0 和 4.0-RC1 版本中发现一处漏洞。该漏洞影响登录/登出组件中 Handler.java 文件的 Handler.redirect 函数。攻击者可通过篡改 rtnUrl 参数引发开放重定向（open redirect）漏洞。此攻击可从远程发起，且利用代码已公开，可能被恶意利用。厂商在漏洞披露初期已被联系，但未作出任何回应。

CVSS 4.3 · Medium

Possible ATT&CK Techniques 1 AI

T1566.002 · Spearphishing Link
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I. Basic Information for CVE-2026-124505

Vulnerability Information
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Vulnerability Title
Dianping CAT Login/Logout Handler.java Handler.redirect
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw has been found in Dianping CAT 3.0.0/3.1.0/4.0-RC1. This affects the function Handler.redirect of the file Handler.java of the component Login/Logout. Executing a manipulation of the argument rtnUrl can lead to open redirect. The attack may be performed from remote. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/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

Affected Products

Vendor Product Affected Versions CPE Subscribe
Dianping CAT 3.0.0 cpe:2.3:a:dianping:cat:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-124505

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III. Intelligence Information for CVE-2026-124505

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Other References for CVE-2026-124505 (1)

Other References for CVE-2026-124505 (3)

IV. Related Vulnerabilities

Same product: CAT
Same vendor: Dianping
Same weakness: CWE-601