Analyst readout for executives and security teams
Plain-English summary
This vulnerability affects the WP Private Content Plus WordPress plugin up to version 3.1. If a logged-in administrator is tricked into interacting with a malicious request, an outside attacker may add group members. Business impact is limited but relevant where private content groups control access to sensitive material.
Executive priority
Handle in normal vulnerability maintenance unless the plugin protects sensitive or paid content. Prioritize affected public-facing WordPress sites, but this is below emergency patching because user interaction is required and no active exploitation is cited.
Technical view
CVE-2021-4385 is a CSRF issue in save_groups() caused by missing or incorrect nonce validation. The reported impact is low-integrity modification: unauthenticated attackers can submit forged requests that add group members when an administrator performs the required user interaction.
Likely exposure
Exposure is limited to WordPress sites running WP Private Content Plus at version 3.1 or earlier. Risk is higher where administrators are frequently logged in and private content groups gate customer, employee, or paid-access content.
Exploitation context
The CVE is not listed in KEV, and the supplied sources do not show active exploitation. Exploitation requires social engineering of a site administrator, so this is not an unauthenticated direct compromise path.
Researcher notes
The source bundle contains an inconsistency: the narrative states versions up to 3.1 are vulnerable, while the affected metadata is sparse and lists version 0 with default unaffected. Use the CVE description, Wordfence entry, and WordPress changeset as primary evidence, then verify vendor release history.
Mitigation direction
- Inventory WordPress sites for WP Private Content Plus installations.
- Update affected installations beyond version 3.1 where vendor guidance confirms a fix.
- If no fixed release is available, disable the plugin until vendor guidance is clear.
- Limit WordPress administrator sessions and access to trusted users only.
- Warn administrators against opening unsolicited links while logged into WordPress.
Validation and detection
- Check each WordPress site for the plugin name and installed version.
- Treat version 3.1 or earlier as potentially affected based on the CVE description.
- Review group membership records for unexpected additions.
- Review administrative activity logs around private content group changes.
- Confirm current plugin code includes nonce validation for group-saving actions.
Public sources used
Based on public source material and reviewed before publication.
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-352: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. 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-2021-4385 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:N/UI:R/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:R/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:N/UI:R/S:U/C:N/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.wordfence.com/threat-intel/vulnerabilities/id/238f6d81-78ba-426c-866a-31f9279e4f99?source=cveCVE reference
- https://blog.nintechnet.com/25-wordpress-plugins-vulnerable-to-csrf-attacks/CVE reference
- https://blog.nintechnet.com/more-wordpress-plugins-and-themes-vulnerable-to-csrf-attacks/CVE reference
- https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-3/CVE reference
- https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-2/CVE reference
- https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-1/CVE reference
- https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-5/CVE reference
- https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-4/CVE reference
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=2473452%40wp-private-content-plus&new=2473452%40wp-private-content-plus&sfp_email=&sfph_mail=CVE reference
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.
Cross-Site Request Forgery (CSRF)
Cross-Site Request Forgery (CSRF) represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.