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CVE-2026-8209

Quick assessment

Affected
gibbonedu gibbon
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.

Gibbon是Gibbon团队的一个解决教育工作者每天遇到的实际问题的学校平台。 Gibbon v30.0.01之前版本存在安全漏洞，该漏洞源于路径遍历，尝试提取Web应用程序PHP文件时，失败的.zip提取导致文件删除和拒绝服务条件，可能导致Web应用程序可用性丧失。

AI Predicted 5.3 Difficulty: Easy EPSS 0.39% · P31

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 1

VendorProduct Version RangeStatus
gibbonedu gibbon < 30.0.01 affected
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I. Basic Information for CVE-2026-8209

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Gibbon versions before v30.0.01 are affected by a path traversal vulnerability resulting in DOS by attempting extraction of web application PHP files, failed .zip extraction results in deletion of the file and a DOS condition. Successful exploitation requires Teacher or higher privileges. Exploitation could result in loss of availability of the web application.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H
Source: CVE Program / CVE List V5
Vulnerability Type
相对路径遍历
Source: CVE Program / CVE List V5
Vulnerability Title
Gibbon 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Gibbon是Gibbon团队的一个解决教育工作者每天遇到的实际问题的学校平台。 Gibbon v30.0.01之前版本存在安全漏洞，该漏洞源于路径遍历，尝试提取Web应用程序PHP文件时，失败的.zip提取导致文件删除和拒绝服务条件，可能导致Web应用程序可用性丧失。
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
gibbonedu gibbon 0 ~ 30.0.01 -

II. Public POCs for CVE-2026-8209

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III. Intelligence Information for CVE-2026-8209

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Security Blog Posts for CVE-2026-8209 (1)

Vendor Pages for CVE-2026-8209 (1)

Same Patch Batch · gibbonedu · 2026-05-09 · 3 CVEs total

CVE-2026-8207 Gibbon SQL注入漏洞
CVE-2026-8208 Gibbon 安全漏洞

IV. Related Vulnerabilities

Same product: gibbon
Same vendor: gibbonedu
Same weakness: CWE-23

V. Comments for CVE-2026-8209

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