EUVD-2026-41790
GHSA-g9x9-wg38-wjf3
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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
CWE-434 in PHP enables webshell upload and RCE with scope change (S:C), requiring only a low-privilege account (PR:L) reachable over the network; no authentication complexity or special conditions apply.
Primary rating from Vendor (VulDB).
CVSS VectorVendor: VulDB
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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
Lifecycle Timeline
5DescriptionCVE.org
A vulnerability was identified in SourceCodester Onlne Examination & Learning Management System 1.0. Affected is an unknown function of the file /process_lesson.php. Such manipulation of the argument user_id leads to unrestricted upload. The attack may be launched remotely. The exploit is publicly available and might be used. The name of the affected product appears to have a typo in it.
AnalysisAI
Unrestricted file upload in SourceCodester Onlne Examination & Learning Management System 1.0 allows network-accessible, low-privilege attackers to upload arbitrary file types - including executable PHP webshells - via the user_id parameter in /process_lesson.php, with the publicly available proof-of-concept explicitly framed as a remote code execution chain. No CISA KEV listing exists, but a working exploit is publicly available on GitHub under the title 'OE-LMS-RCE-1'. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires possession of a valid low-privilege application account, consistent with CVSS PR:L - in an LMS context this corresponds to a standard student or learner registration, which may be self-serviceable on open-enrollment instances. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The provided CVSS 4.0 score of 2.1 is inconsistent with the underlying vulnerability class and the evidence in the POC. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker holding a standard student account sends a crafted HTTP POST request to `/process_lesson.php`, embedding a PHP webshell as a lesson file upload while manipulating the `user_id` parameter. The server stores the file in a web-accessible directory without validating the file extension or MIME type, and the attacker retrieves it via a direct GET request, triggering server-side PHP execution and obtaining arbitrary OS command execution as the web server process user. … |
| Remediation | No vendor-released patch has been identified at time of analysis for SourceCodester Onlne Examination & Learning Management System 1.0; the VulDB advisory at https://vuldb.com/?id.376365 should be monitored for any future patch release. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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