Vulnerability in Thexerteproject Xerteonlinetoolkits
CVE-2026-34413
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 · last modified .
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L.
EPSS exploit prediction
EPSS: 0.031 (87.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 87.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.031 · newest: 0.031 · change: -0.000
Affected products
- Thexerteproject Xerteonlinetoolkits — versions 3.15.0, 3.14.0, 3.13.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/bootstrapbool/xerteonlinetoolkits-rce (technical-description, exploit)
- xerte.org.uk/xertetoolkits_3.15_ChangeLog.html (release-notes)
- xerte.org.uk/index.php/en/downloads-1/category/3-xerte-online-toolkits (product, permissions-required)
- github.com/thexerteproject/xerteonlinetoolkits/issues/1527 (issue-tracking)
- github.com/thexerteproject/xerteonlinetoolkits/commit/02661be88cc369325ea01b508… (patch)
- github.com/thexerteproject/xerteonlinetoolkits/commit/17e4f945fe6a3400fa88c01ed… (patch)
- github.com/thexerteproject/xerteonlinetoolkits/commit/507d55c5e91bf9310b5b1c7fa… (patch)
- www.vulncheck.com/advisories/xerte-online-toolkits-missing-authentication-via-c… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-34413?
- CVE-2026-34413 is a high-severity vulnerability in Thexerteproject Xerteonlinetoolkits, classified under Exposure of Sensitive System Information to an Unauthorized Control Sphere. CVSS score: 8.6/10. Published 2026-04-22.
- How severe is CVE-2026-34413?
- High severity. CVSS v3 base score is 8.6 out of 10.
- Is CVE-2026-34413 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.