Security readout for executives and security teams
Plain-English summary
CVE-2026-4136 affects the WordPress Restrict Content membership plugin. A password reset flow can be abused to send a user to an attacker-chosen external site. This does not give direct server access, but it can support phishing or account-trust abuse if a user is tricked into using a crafted reset email flow.
Executive priority
Treat this as a moderate-priority web trust issue. It is unlikely to compromise servers directly, but it can help attackers redirect members during password reset interactions. Patch during the next normal WordPress maintenance window, faster for high-brand-risk membership sites.
Technical view
Restrict Content versions up to and including 3.2.24 insufficiently validate the rcp_redirect URL parameter in the password reset flow. The issue is classified as CWE-640 with CVSS 4.3. It is unauthenticated but requires user interaction, has low integrity impact, and no stated confidentiality or availability impact.
Likely exposure
Exposure is limited to WordPress sites running the Restrict Content plugin at version 3.2.24 or earlier. Sites using password reset functionality are the relevant concern. The source bundle does not identify affected hosted services, downstream forks, or a specific fixed release number.
Exploitation context
The CVE is not listed as KEV, and the provided sources do not claim active exploitation. Abuse requires convincing a user to perform an action involving the password reset flow. The practical risk is phishing redirection, brand abuse, or user credential-harvesting on an external site.
Researcher notes
The public record points to insufficient validation of rcp_redirect in login-functions.php and a WordPress plugin repository changeset. The provided data does not name a fixed version. Avoid assuming exploit activity or broader impact beyond the documented open redirect/password reset context.
Mitigation direction
- Inventory WordPress sites using the Restrict Content plugin.
- Prioritize remediation for versions 3.2.24 and earlier.
- Check vendor and WordPress plugin guidance for the fixed release.
- Update when a vendor-confirmed fixed version is available.
- Consider temporary workflow controls if password reset abuse risk is unacceptable.
Validation and detection
- Confirm whether the restrict-content plugin is installed on each WordPress site.
- Record installed plugin versions and flag versions 3.2.24 or earlier.
- Review vendor advisory and WordPress changeset 3486071 for remediation confirmation.
- After updating, verify the installed version is beyond the affected range.
- Review logs for suspicious password reset redirection patterns.
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-640: 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-2026-4136 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/e4cf42d3-9864-440b-8357-36c82cbef28f?source=cveCVE reference
- https://plugins.trac.wordpress.org/browser/restrict-content/tags/3.2.24/core/includes/login-functions.php#L270CVE reference
- https://plugins.trac.wordpress.org/changeset/3486071/restrict-contentCVE 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.
Weak Password Recovery Mechanism for Forgotten Password
Weak Password Recovery Mechanism for Forgotten Password represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.