CVE-2026-34413 | THREATINT

Description

Xerte Online Toolkits versions 3.15 and earlier contain a missing authentication vulnerability in the elFinder connector endpoint at /editor/elfinder/php/connector.php where an HTTP redirect to unauthenticated callers does not call exit() or die(), allowing PHP execution to continue and process the full request server-side. Unauthenticated attackers can perform file operations on project media directories including creating directories, uploading files, renaming files, duplicating files, overwriting files, and deleting files, which can be chained with path traversal and extension blocklist vulnerabilities to achieve remote code execution and arbitrary file read.

PUBLISHED Reserved 2026-03-27 | Published 2026-04-22 | Updated 2026-04-22 | Assigner VulnCheck

HIGH: 8.8CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N

HIGH: 8.6CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L

Problem types

CWE-497 Exposure of Sensitive System Information to an Unauthorized Control Sphere

Product status

Default status
unaffected

3.15.0 (semver)
affected

3.14.0 (semver)
affected

3.13.0 (semver)
affected

Any version before 02661be88cc369325ea01b508086bde7fbfec805
affected

Any version before 17e4f945fe6a3400fa88c01eda18c1075ee4a212
affected

Any version before 507d55c5e91bf9310b5b1c7fad8aebfef902ad23
affected

Credits

bootstrapbool finder

References

xerte.org.uk/xertetoolkits_3.15_ChangeLog.html release-notes

xerte.org.uk/…downloads-1/category/3-xerte-online-toolkits product permissions-required

github.com/thexerteproject/xerteonlinetoolkits/issues/1527 issue-tracking

github.com/…ommit/02661be88cc369325ea01b508086bde7fbfec805 patch

github.com/…ommit/17e4f945fe6a3400fa88c01eda18c1075ee4a212 patch

github.com/…ommit/507d55c5e91bf9310b5b1c7fad8aebfef902ad23 patch

www.vulncheck.com/…issing-authentication-via-connector-php third-party-advisory

cve.org (CVE-2026-34413)

nvd.nist.gov (CVE-2026-34413)

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