Security readout for executives and security teams
Plain-English summary
CVE-2023-27753 is a high-severity file upload flaw reported in MK-Auth 23.01K4.9. A crafted PHP upload could lead to arbitrary code execution, turning a web application issue into potential server compromise. Public affected-product metadata is sparse, so confirm exposure against actual MK-Auth deployments.
Executive priority
Treat this as a near-term remediation item for any exposed MK-Auth environment. The business risk is server compromise, but confidence is limited by sparse vendor and affected-product metadata in the public record.
Technical view
The CVE describes CWE-434 unrestricted upload of a dangerous file type. CVSS 3.1 is 8.0 with network access, low complexity, low privileges, user interaction required, and high confidentiality, integrity, and availability impact. The listed references include a public GitHub RCE writeup, but the bundle names no vendor patch.
Likely exposure
Organizations running MK-Auth 23.01K4.9, especially internet-facing instances where authenticated low-privilege users can access upload functionality. The structured affected fields are listed as n/a, so asset owners must validate exposure from local inventories and vendor information.
Exploitation context
The source bundle does not show CISA KEV listing or cited active exploitation. Public GitHub references exist for an RCE issue, which raises reproduction risk, but this analysis cannot claim exploitation in the wild from the supplied evidence.
Researcher notes
Avoid assuming broader product versions beyond MK-Auth 23.01K4.9. Validate the upload handling, privilege requirements, and execution path in a controlled environment. No official fix is named in the supplied sources, so remediation should be aligned with vendor guidance.
Mitigation direction
- Identify any MK-Auth 23.01K4.9 deployments and prioritize exposed instances.
- Check MK-Auth vendor or maintainer guidance for patched versions or official mitigations.
- Restrict access to upload-capable areas to trusted administrative users only.
- Prevent uploaded files from executing as PHP where web server configuration supports it.
- Review recent uploads and server logs for unexpected PHP files or suspicious upload activity.
Validation and detection
- Confirm MK-Auth version and whether the instance matches 23.01K4.9.
- Map all public and authenticated upload paths in the deployment.
- Review upload storage locations for unexpected executable PHP content.
- Check web server logs for suspicious upload requests and follow-on execution attempts.
- Document whether compensating controls block execution of uploaded scripts.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-434: File access and web shell behavior lookup
File traversal and upload weaknesses can lead teams to review file, web shell, execution, and collection telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2023-27753 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H2.15.9CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
8HighVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/yueslly/MKAUTH-RCE/blob/main/README.mdCVE reference, mitre
- https://github.com/yueslly/MKAUTH-RCECVE reference, mitre
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Unrestricted Upload of File with Dangerous Type
Unrestricted Upload of File with Dangerous Type represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.