Security readout for executives and security teams
Plain-English summary
CVE-2023-49858 is a broken access control issue in the WordPress Custom Login plugin up to version 4.1.0. An authenticated user may be able to perform an action that should require stronger authorization. The published score is medium, with low integrity impact and no reported confidentiality or availability impact.
Executive priority
Treat this as a moderate WordPress hygiene issue, not an emergency based on the provided evidence. Prioritize sites with public registration, many users, or sensitive branding/login workflows. Remediate during the next plugin maintenance cycle unless local exposure is unusually broad.
Technical view
The issue is described as CWE-862 Missing Authorization in Austin Custom Login custom-login through 4.1.0. CVSS 3.1 is 4.3: network reachable, low complexity, low privileges required, no user interaction, unchanged scope, low integrity impact only.
Likely exposure
Exposure is limited to WordPress sites that have the Custom Login plugin installed at version 4.1.0 or earlier. The CVSS vector requires an authenticated low-privileged user, so sites with open registration or many contributor-level accounts may face higher practical risk.
Exploitation context
The source bundle does not show CISA KEV listing or other cited evidence of active exploitation. The vulnerability is not described as unauthenticated or remote code execution. Practical impact appears to depend on what unauthorized plugin action is reachable by low-privileged users.
Researcher notes
Available details are sparse: the bundle identifies missing authorization but not the exact protected action, endpoint, or fixed version. Avoid assuming exploitability beyond authenticated low-privileged integrity impact. Validation should focus on asset/version exposure and vendor advisory follow-up.
Mitigation direction
- Inventory WordPress sites for the custom-login plugin and installed version.
- Check vendor or Patchstack guidance for a fixed version or official mitigation.
- Upgrade if an official fixed release is available from a trusted source.
- Disable or remove the plugin where no fix is available and business impact allows.
- Limit low-privileged WordPress accounts, especially on sites with public registration.
Validation and detection
- Confirm whether Custom Login is installed on each WordPress site.
- Record plugin versions and flag 4.1.0 or earlier for review.
- Review WordPress user registration and role assignment settings.
- Check administrative logs for unexpected Custom Login configuration changes.
- Track remediation status against vendor or Patchstack advisories.
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-862: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. 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 lookupCVE-2023-49858 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
- 4.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/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:L/UI:N/S:U/C:N/I:L/A:N2.81.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/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.
Missing Authorization
Missing Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.