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Xerte Online Toolkits CVE-2026-34414

| EUVD-2026-25068 HIGH
Path Traversal (CWE-22)
2026-04-22 VulnCheck GHSA-qmm4-q4hj-r5cm
RCE PHP XSS Path Traversal
7.1
CVSS 4.0 · NVD
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Severity by source

NVD PRIMARY
7.1 HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

6
Re-analysis Queued
Apr 24, 2026 - 20:22 vuln.today
cvss_changed
Analysis Generated
Apr 23, 2026 - 06:57 vuln.today
EUVD ID Assigned
Apr 22, 2026 - 19:01 euvd
EUVD-2026-25068
Analysis Generated
Apr 22, 2026 - 19:01 vuln.today
Patch released
Apr 22, 2026 - 19:01 nvd
Patch available
CVE Published
Apr 22, 2026 - 18:32 nvd
HIGH 7.1

DescriptionCVE.org

Xerte Online Toolkits versions 3.15 and earlier contain a relative path traversal vulnerability in the elFinder connector endpoint at /editor/elfinder/php/connector.php where the name parameter in rename commands is not sanitized for path traversal sequences. Attackers can supply a name value containing directory traversal sequences to move files from project media directories to arbitrary locations on the filesystem, potentially overwriting application files, achieving stored cross-site scripting, or combining with other vulnerabilities to achieve unauthenticated remote code execution by moving PHP code files to the application root.

AnalysisAI

Path traversal in Xerte Online Toolkits' elFinder connector allows authenticated attackers to move files to arbitrary filesystem locations, enabling application file overwrites, stored XSS, or chained remote code execution. Affects versions 3.15 and earlier through unsanitized rename operations at /editor/elfinder/php/connector.php. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Recon
Authenticate with low-privilege account
Delivery
Upload malicious PHP file to project media
Exploit
Intercept rename POST to /editor/elfinder/php/connector.php
Install
Inject traversal sequences in name parameter
C2
Move file to application root
Execute
Execute relocated PHP via HTTP request
Impact
Achieve RCE with web server privileges
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Vulnerability AssessmentAI

Exploitation Requires authenticated access with low privileges (PR:L in CVSS vector) to Xerte Online Toolkits, specifically user accounts with permission to create projects and upload files to project media directories. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 7.1 score reflects high integrity impact (VI:H) with network attack vector (AV:N), low complexity (AC:L), and low privileges required (PR:L), indicating straightforward exploitation by any authenticated user. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An authenticated attacker with low-privilege access to Xerte Online Toolkits creates a learning project and uploads a malicious PHP shell to their project media directory (legitimate functionality). They intercept the rename request to /editor/elfinder/php/connector.php and modify the 'name' parameter to '../../../index.php' or '../../../shell.php', moving their uploaded file from the sandboxed media directory to the application root. …
Remediation Apply vendor patches immediately by upgrading to Xerte Online Toolkits version incorporating GitHub commits 02661be88cc369325ea01b508086bde7fbfec805, 507d55c5e91bf9310b5b1c7fad8aebfef902ad23, and 17e4f945fe6a3400fa88c01eda18c1075ee4a212, available from https://xerte.org.uk/index.php/en/downloads-1/category/3-xerte-online-toolkits. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours: Inventory all Xerte Online Toolkits instances and identify versions running 3.15 or earlier. …

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CVE-2026-34414 vulnerability details – vuln.today
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