CVE-2026-34415: CWE-184 Incomplete List of Disallowed Inputs in thexerteproject xerteonlinetoolkits
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.
AI Analysis
Technical Summary
CVE-2026-34415 is an input validation vulnerability (CWE-184) in thexerteproject's xerteonlinetoolkits affecting versions 3.15 and earlier. The elFinder connector endpoint uses an incorrect regex pattern that does not block PHP-executable extensions like .php4. Attackers can exploit this by uploading malicious PHP code renamed with a .php4 extension, combined with authentication bypass and path traversal vulnerabilities, to execute arbitrary OS commands on the server. The vulnerability is unauthenticated and has a CVSS 4.0 score of 9.3, indicating critical severity.
Potential Impact
Successful exploitation allows unauthenticated attackers to upload and execute arbitrary PHP code on the server, leading to arbitrary operating system command execution. This can result in full compromise of the affected server hosting xerteonlinetoolkits versions 3.15 and earlier.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the elFinder connector endpoint and monitor for suspicious upload activity. Avoid exposing the vulnerable versions publicly and consider upgrading once a patch is released.
CVE-2026-34415: CWE-184 Incomplete List of Disallowed Inputs in thexerteproject xerteonlinetoolkits
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.
CVSS v4.0
Score 9.3critical
Affected software
pkg:github/thexerteproject/xerteonlinetoolkitsRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-34415 is an input validation vulnerability (CWE-184) in thexerteproject's xerteonlinetoolkits affecting versions 3.15 and earlier. The elFinder connector endpoint uses an incorrect regex pattern that does not block PHP-executable extensions like .php4. Attackers can exploit this by uploading malicious PHP code renamed with a .php4 extension, combined with authentication bypass and path traversal vulnerabilities, to execute arbitrary OS commands on the server. The vulnerability is unauthenticated and has a CVSS 4.0 score of 9.3, indicating critical severity.
Potential Impact
Successful exploitation allows unauthenticated attackers to upload and execute arbitrary PHP code on the server, leading to arbitrary operating system command execution. This can result in full compromise of the affected server hosting xerteonlinetoolkits versions 3.15 and earlier.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the elFinder connector endpoint and monitor for suspicious upload activity. Avoid exposing the vulnerable versions publicly and consider upgrading once a patch is released.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-03-27T15:24:06.752Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69e91af419fe3cd2cde2a8be
Added to database: 04/22/2026, 19:01:08 UTC
Last enriched: 07/15/2026, 10:55:43 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 176
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.