CVE-2026-34415CRITICAL 9.8EPSS p78.8%

CVE-2026-34415CVE-2026-34415

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.

Scoring

CVSS 3.19.8 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS2.06% probability of exploitation · percentile 78.8% · 2026-06-18T12:00:27Z
Published2026-04-22
Last modified2026-04-24

Underlying weaknesses· 1

CWE-184

References

  1. https://github.com/bootstrapbool/xerteonlinetoolkits-rce
  2. https://github.com/thexerteproject/xerteonlinetoolkits/commit/02661be88cc369325ea01b508086bde7fbfec805
  3. https://github.com/thexerteproject/xerteonlinetoolkits/commit/17e4f945fe6a3400fa88c01eda18c1075ee4a212
  4. https://github.com/thexerteproject/xerteonlinetoolkits/commit/507d55c5e91bf9310b5b1c7fad8aebfef902ad23
  5. https://github.com/thexerteproject/xerteonlinetoolkits/issues/1527
  6. https://www.vulncheck.com/advisories/xerte-online-toolkits-file-upload-rce-via-elfinder-connector
  7. https://xerte.org.uk/index.php/en/downloads-1/category/3-xerte-online-toolkits
  8. https://xerte.org.uk/xertetoolkits_3.15_ChangeLog.html

1

TypeTargetConfidenceTier
WeaknessIncomplete List of Disallowed Inputscwe-1840%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.