Security readout for executives and security teams
Plain-English summary
CVE-2026-4302 affects the WowOptin WordPress plugin up to version 1.4.29. An unauthenticated internet user could make the website’s server send requests to attacker-chosen locations. This can expose or alter internal services reachable only from the server, depending on hosting and network controls.
Executive priority
Prioritize remediation for public WordPress sites, especially in cloud or segmented environments with sensitive internal services. Treat as high urgency, but not confirmed actively exploited from the provided evidence.
Technical view
The plugin exposes a public REST API endpoint, optn/v1/integration-action, with permission_callback set to __return_true. User-controlled URLs are passed to wp_remote_get() and wp_remote_post() in Webhook::add_subscriber() without validation or wp_safe_remote_get/post protections, creating SSRF. CVSS is 7.2 high, CWE-918.
Likely exposure
Internet-facing WordPress sites running WowOptin: Next-Gen Popup Maker versions up to and including 1.4.29 are the likely exposure. Risk is higher where the web server can reach internal applications, cloud metadata services, or administrative interfaces.
Exploitation context
The source bundle reports unauthenticated network exploitation with low complexity and no user interaction. It could be used to send requests from the WordPress server to arbitrary destinations. KEV is false, and the provided sources do not establish active exploitation in the wild.
Researcher notes
Key indicators are the unauthenticated REST route, __return_true permission callback, direct wp_remote_get/post use, and missing URL restriction. The provided sources support the vulnerability mechanics, but do not clearly name a fixed version beyond indicating versions through 1.4.29 are affected.
Mitigation direction
- Inventory WordPress sites for the WowOptin plugin and installed version.
- Check vendor and Wordfence guidance for a fixed release or official mitigation.
- Update the plugin if a patched version is available.
- Disable or remove the plugin if it is not business-critical.
- Restrict access to the affected REST route using WAF or server controls where feasible.
- Limit outbound server access to internal networks and sensitive metadata endpoints.
Validation and detection
- Confirm whether WowOptin is installed and version is 1.4.29 or earlier.
- Review plugin code for the public optn/v1/integration-action REST route.
- Verify whether permission_callback is publicly permissive.
- Check whether Webhook::add_subscriber() accepts unvalidated URLs for remote requests.
- Review web and outbound proxy logs for unusual requests tied to the REST route.
- Validate remediation by confirming vendor-fixed code or plugin removal.
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-918: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. 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 lookupCloud metadata behavior lookup
The CVE wording references SSRF or metadata access, so cloud discovery and credential material review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-4302 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
- High
- CVSS
- 7.2 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/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:C/C:L/I:L/A:N3.92.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.2HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.wordfence.com/threat-intel/vulnerabilities/id/b1c3e480-0221-4913-bcce-f34ded9edca8?source=cveCVE reference
- https://plugins.trac.wordpress.org/browser/optin/trunk/includes/integrations/implementations/class-webhook.php#L38CVE reference
- https://plugins.trac.wordpress.org/browser/optin/tags/1.4.23/includes/integrations/implementations/class-webhook.php#L38CVE reference
- https://plugins.trac.wordpress.org/browser/optin/trunk/frontend/class-rest-frontend.php#L55CVE reference
- https://plugins.trac.wordpress.org/browser/optin/tags/1.4.23/frontend/class-rest-frontend.php#L55CVE reference
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3484392%40optin&new=3484392%40optin&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.
Server-Side Request Forgery (SSRF)
Server-Side Request Forgery (SSRF) represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.