How to fix CVE-2026-34415?

Within 24 hours: Identify all Xerte Online Toolkits instances in your environment and confirm versions (target versions 3.15 and earlier). Within 7 days: Apply vendor-released patches via GitHub commits 02661be, 17e4f94, or 507d55c, or upgrade to patched release version. Implement network-level access controls restricting direct internet access to Xerte elFinder connector endpoints (/elFinder) if immediate patching is blocked. Within 30 days: Conduct forensic analysis of upload directories and PHP execution logs for indicators of compromise; audit file systems for suspicious .php4 files or recently modified PHP files; review access logs for exploitation attempts.

Is Xerte Online Toolkits affected by CVE-2026-34415?

Xerte Online Toolkits versions 3.15 and earlier contain a critical remote code execution vulnerability allowing unauthenticated attackers to upload and execute arbitrary code on affected servers, potentially leading to complete system compromise.

Xerte Online Toolkits CVE-2026-34415

EUVD-2026-25069 CRITICAL

Incomplete List of Disallowed Inputs (CWE-184)

2026-04-22 VulnCheck

PHP Authentication Bypass Path Traversal

9.3

CVSS 4.0

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Lifecycle Timeline

Re-analysis Queued

Apr 24, 2026 - 20:22 vuln.today

cvss_changed

Analysis Generated

Apr 23, 2026 - 06:44 vuln.today

CVSS changed

Apr 22, 2026 - 19:22 NVD

9.8 (CRITICAL) 9.3 (CRITICAL)

DescriptionNVD

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.

AnalysisAI

Remote code execution in Xerte Online Toolkits 3.15 and earlier allows unauthenticated attackers to upload and execute arbitrary PHP code by chaining an incomplete file extension filter bypass (.php4 extension) with authentication bypass and path traversal vulnerabilities in the elFinder connector endpoint. Attackers can achieve complete server compromise by uploading malicious PHP files, renaming them with the .php4 extension to evade filtering, and executing operating system commands. …

RemediationAI

Within 24 hours: Identify all Xerte Online Toolkits instances in your environment and confirm versions (target versions 3.15 and earlier). Within 7 days: Apply vendor-released patches via GitHub commits 02661be, 17e4f94, or 507d55c, or upgrade to patched release version. …

Analysis

Detailed AI-generated intelligence summary covering attack vector, impact assessment, affected versions, remediation steps, and indicators of compromise.

POChttps://••••••••••.com/exploit

PATCHhttps://••••••••••.com/patch

ADVISORYhttps://••••••••••.com/advisory

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CVE-2026-34415 vulnerability details – vuln.today

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Xerte Online Toolkits CVE-2026-34415

CVSS VectorNVD

Lifecycle Timeline

DescriptionNVD

AnalysisAI

RemediationAI

Analysis

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Xerte Online Toolkits CVE-2026-34415

CVSS VectorNVD

Lifecycle Timeline

DescriptionNVD

AnalysisAI

RemediationAI

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External POC / Exploit Code