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CVE-2026-9357— vBulletin Login cross site scripting

Quick assessment

Affected
n/a vBulletin
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.

vBulletin是美国vBulletin公司的一款基于PHP和MySQL的开源Web论坛程序。 vBulletin 6.x版本存在代码注入漏洞，该漏洞源于Login组件操作不当，可能导致跨站脚本攻击。

CVSS 3.5 · Low EPSS 0.28% · P21

Affected Version Matrix 1

VendorProduct Version RangeStatus
n/a vBulletin 6.* affected
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I. Basic Information for CVE-2026-9357

Vulnerability Information
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Vulnerability Title
vBulletin Login cross site scripting
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was found in vBulletin 6.x. This impacts an unknown function of the component Login. Performing a manipulation results in cross site scripting. It is possible to initiate the attack remotely. The exploit has been made public and could be used. VulDB is withholding an extended redistribution of exploit details to prevent simplified exploitation. 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:L/UI:R/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
vBulletin 代码注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
vBulletin是美国vBulletin公司的一款基于PHP和MySQL的开源Web论坛程序。 vBulletin 6.x版本存在代码注入漏洞，该漏洞源于Login组件操作不当，可能导致跨站脚本攻击。
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
- vBulletin 6.* cpe:2.3:a:vbulletin:vbulletin:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-9357

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III. Intelligence Information for CVE-2026-9357

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Vendor Advisories for CVE-2026-9357 (1)

Same Patch Batch · n/a · 2026-05-24 · 5 CVEs total

CVE-2026-9376 6.3 MEDIUM JPress UCenter Article Submission Endpoint doWriteSave improper authorization
CVE-2026-9365 5.6 MEDIUM Ettercap GG Dissector ec_gg.c FUNC_DECODER heap-based overflow
CVE-2026-9358 4.3 MEDIUM postcss-selector-parser AST Serialization container.js toString recursion
CVE-2026-9373 3.7 LOW JeecgBoot OpenAPI Endpoint call improper authentication

IV. Related Vulnerabilities

Same product: vBulletin
Same vendor: n/a
Same weakness: CWE-79

V. Comments for CVE-2026-9357

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