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PatchSiren cyber security CVE debrief

CVE-2023-5636 ArslanSoft CVE debrief

CVE-2023-5636 is a critical vulnerability in ArslanSoft Education Portal before v1.1 involving unrestricted upload of a dangerous file type. The published CVSS vector indicates remote, unauthenticated exploitation with low attack complexity and high impact to confidentiality, integrity, and availability. The official record and linked USOM advisory describe the issue as capable of leading to command injection, so exposed deployments should treat this as an urgent patch-and-contain item.

Vendor
ArslanSoft
Product
Education Portal
CVSS
CRITICAL 9.8
CISA KEV
Not listed in stored evidence
Original CVE published
2023-12-01
Original CVE updated
2026-05-20
Advisory published
2023-12-01
Advisory updated
2026-05-20

Who should care

Administrators and security teams responsible for ArslanSoft Education Portal deployments, especially any instance exposed to the internet or allowing user file uploads. Hosting providers and incident response teams should also prioritize review if this product is present in their environments.

Technical summary

The NVD record maps this issue to CWE-434 and lists the affected CPE as ArslanSoft Education Portal versions before 1.1. The CVSS 3.1 vector is AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H, which means a network-reachable attack can be attempted without privileges or user interaction and can have severe impact. The USOM-linked advisory adds that the flaw can allow command injection, consistent with unsafe handling of uploaded files.

Defensive priority

Urgent

Recommended defensive actions

  • Identify whether ArslanSoft Education Portal is installed and whether any instance is running a version before v1.1.
  • Upgrade to v1.1 or later if that fixed version is available in your distribution or vendor package.
  • If you cannot upgrade immediately, restrict access to the upload functionality and place the application behind stronger network controls.
  • Review file-upload handling to ensure strict allowlisting, server-side validation, non-executable storage, and separation of uploaded content from application code paths.
  • Audit logs and host telemetry for suspicious upload activity or unexpected command execution around affected systems.
  • If the product is internet-facing, prioritize patching and temporary exposure reduction as an immediate containment step.

Evidence notes

This debrief is based on the supplied official NVD CVE record and the linked USOM advisory references. The NVD data provides the affected version range (before 1.1), the CVSS 3.1 vector AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H, and the CWE-434 mapping. The advisory references support the command-injection characterization. Published date is 2023-12-01; the modified date 2026-05-20 reflects later record updates, not the original issue date.

Official resources

Publicly disclosed on 2023-12-01 in the official CVE/NVD record, with linked USOM advisory references available from the same disclosure period. The record was later modified on 2026-05-20.