by Kastro
Paper/Archive/CVE-2026-34415

CVE-2026-34415

thexerteproject xerteonlinetoolkits — Xerte Online Toolkits File Upload RCE via elfinder Connector

EPSS 4%CVSS 9.8
critical.is priorityof 100
47
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 89.4.894 × 2017.9No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
xerteonlinetoolkits≤ 3.15.0–CNA

Scores by source

VulnCheck (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
VulnCheck (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

exploitgithub.com/bootstrapbool/xerteonlinetoolkits-rcerefxerte.org.uk/xertetoolkits_3.15_ChangeLog.htmlrefxerte.org.uk/index.php/en/downloads-1/category/3-xerte-online-toolkitsrefgithub.com/thexerteproject/xerteonlinetoolkits/issues/1527patchgithub.com/thexerteproject/xerteonlinetoolkits/commit/02661be88cc369325ea01b508086bde7fbfec805patchgithub.com/thexerteproject/xerteonlinetoolkits/commit/17e4f945fe6a3400fa88c01eda18c1075ee4a212patchgithub.com/thexerteproject/xerteonlinetoolkits/commit/507d55c5e91bf9310b5b1c7fad8aebfef902ad23writeupvulncheck.com/advisories/xerte-online-toolkits-file-upload-rce-via-elfinder-connector