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CVE-2026-34415— Xerte Online Toolkits File Upload RCE via elfinder Connector

Quick assessment

Affected
thexerteproject xerteonlinetoolkits
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Xerte Online Toolkits是英国Xerte公司的一个在线学习内容制作平台。 Xerte Online Toolkits 3.15及之前版本存在安全漏洞，该漏洞源于elFinder连接器端点输入验证不完整，未能阻止.php4等PHP可执行扩展，未经身份验证的攻击者可利用此缺陷结合身份验证绕过和路径遍历漏洞上传恶意PHP代码，将其重命名为.php4扩展，并在服务器上执行任意操作系统命令。

CVSS 9.8 · Critical EPSS 4.43% · P91

Affected Version Matrix 1

VendorProduct Version RangeStatus
thexerteproject xerteonlinetoolkits ≤ 3.15.0 affected
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I. Basic Information for CVE-2026-34415

Vulnerability Information
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Vulnerability Title
Xerte Online Toolkits File Upload RCE via elfinder Connector
Source: CVE Program / CVE List V5
Vulnerability Description
Xerte Online Toolkits versions 3.15 and earlier contain an incomplete input validation vulnerability in the elFinder connector endpoint that fails to block PHP-executable extensions .php4 due to an incorrect regex pattern. Unauthenticated attackers can exploit this flaw combined with authentication bypass and path traversal vulnerabilities to upload malicious PHP code, rename it with a .php4 extension, and execute arbitrary operating system commands on the server.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不完整的黑名单
Source: CVE Program / CVE List V5
Vulnerability Title
Xerte Online Toolkits 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Xerte Online Toolkits是英国Xerte公司的一个在线学习内容制作平台。 Xerte Online Toolkits 3.15及之前版本存在安全漏洞，该漏洞源于elFinder连接器端点输入验证不完整，未能阻止.php4等PHP可执行扩展，未经身份验证的攻击者可利用此缺陷结合身份验证绕过和路径遍历漏洞上传恶意PHP代码，将其重命名为.php4扩展，并在服务器上执行任意操作系统命令。
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)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
thexerteproject xerteonlinetoolkits 0 ~ 3.15.0 -

II. Public POCs for CVE-2026-34415

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III. Intelligence Information for CVE-2026-34415

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Patches & Fixes for CVE-2026-34415 (3)

Vendor Advisories for CVE-2026-34415 (1)

Exploits & Public PoCs for CVE-2026-34415 (1)

Other References for CVE-2026-34415 (1)

Same Patch Batch · thexerteproject · 2026-04-22 · 4 CVEs total

CVE-2026-34413 8.6 HIGH Xerte Online Toolkits Missing Authentication via connector.php
CVE-2026-34414 7.1 HIGH Xerte Online Toolkits Path Traversal via connector.php
CVE-2026-41459 5.3 MEDIUM Xerte Online Toolkits Path Disclosure via /setup

IV. Related Vulnerabilities

Same product: xerteonlinetoolkits
Same vendor: thexerteproject
Same weakness: CWE-184

V. Comments for CVE-2026-34415

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