Security readout for executives and security teams
Plain-English summary
This affects WordPress sites using Metagauss RegistrationMagic through version 5.2.5.0. The issue may let an unauthenticated user bypass IP-based limiting or access control checks by spoofing identity-related network information, causing limited integrity impact. It is not currently listed as known exploited in CISA KEV.
Executive priority
Treat as a moderate WordPress plugin risk. Prioritize public-facing sites and sites where RegistrationMagic protects business workflows, but do not classify it as emergency exploitation without new evidence.
Technical view
CVE-2023-51543 is a CWE-290 authentication bypass by spoofing in RegistrationMagic. CVSS 3.1 is 5.3: network reachable, low complexity, no privileges, no user interaction, unchanged scope, integrity impact only. The provided sources do not include exploit details or a named fixed version.
Likely exposure
Exposure is most likely on WordPress sites with the RegistrationMagic plugin package custom-registration-form-builder-with-submission-manager installed at version 5.2.5.0 or earlier, especially where IP limits or ACL-constrained functionality are security-relevant.
Exploitation context
Provided sources show a public vulnerability database entry and official CVE metadata. KEV is false, and no cited source states active exploitation. The vector still makes internet-exposed WordPress installations worth inventorying promptly.
Researcher notes
The source bundle does not provide proof-of-concept details, patched-version data, or exploitation telemetry. Validation should stay focused on asset presence, version state, configuration relevance, and vendor guidance rather than exploit reproduction.
Mitigation direction
- Inventory WordPress sites for RegistrationMagic installations and versions.
- Check vendor or Patchstack guidance for an updated safe version.
- Upgrade, disable, or remove affected plugin versions where feasible.
- Avoid relying on IP limits as the only control for sensitive workflows.
- Monitor RegistrationMagic-related activity for suspicious unauthenticated access patterns.
Validation and detection
- Confirm whether RegistrationMagic is installed on each WordPress site.
- Record plugin version and flag 5.2.5.0 or earlier.
- Identify workflows depending on IP limits or plugin access controls.
- Review recent logs for unusual registration or form activity.
- Document remediation status and residual exposure for each site.
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-290: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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 lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2023-51543 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
- Medium
- CVSS
- 5.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
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.
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:N/UI:N/S:U/C:N/I:L/A:N3.91.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source materials
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.
Authentication Bypass by Spoofing
Authentication Bypass by Spoofing represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.