Security readout for executives and security teams
Plain-English summary
This is a medium-severity WordPress plugin access-control flaw. A logged-in low-privilege user may be able to perform actions they should not be authorized to perform. The source bundle does not show data theft impact, active exploitation, or detailed attack mechanics.
Executive priority
Prioritize this for WordPress membership sites because authenticated users may affect site behavior or content. It is not currently supported as an emergency KEV-style issue from the supplied sources, but exposed membership portals should remediate promptly.
Technical view
CVE-2023-39990 is a CWE-862 missing authorization issue affecting the named Paid Memberships Pro component through version 1.2.3. CVSS 3.1 is 5.4: network-accessible, low complexity, low privileges required, no user interaction, low integrity and availability impact, and no confidentiality impact.
Likely exposure
Exposure is most likely on WordPress sites running the affected Paid Memberships Pro component at version 1.2.3 or earlier. Because the CVSS vector requires low privileges, anonymous exploitation is not supported by the supplied sources.
Exploitation context
The CVE is not listed as KEV in the supplied bundle. No cited source here confirms active exploitation, public exploit availability, or a specific vulnerable endpoint. Treat exploitation evidence as incomplete.
Researcher notes
The bundle has a naming ambiguity: it names Paid Memberships Pro, while the Patchstack URL refers to the Courses for Membership Add On. Validate the exact plugin slug/component before scoring exposure. Endpoint, fixed version, and mitigation details are not present in the supplied evidence.
Mitigation direction
- Inventory WordPress sites for the affected Paid Memberships Pro component and version.
- Check vendor and Patchstack guidance for a fixed version or official workaround.
- Upgrade the affected component if an official fixed release is available.
- Restrict low-privilege account creation where the plugin is exposed.
- Review WordPress roles and plugin permissions for least privilege.
Validation and detection
- Confirm whether the installed component matches the CVE and Patchstack listing.
- Verify installed version is not 1.2.3 or earlier.
- Review application logs for unusual low-privilege account actions.
- Test authorization boundaries in staging without bypass or exploit tooling.
- Confirm remediation against vendor or Patchstack advisory details.
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-2023-39990 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
- 5.4 (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:L
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:L2.82.5Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.4MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
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.