CVE-2026-121509 Details
Description
A security flaw has been discovered in Headless CMS Plugin up to 2.0.4 on WordPress. This affects the function get_required_post_data of the file /wp-json/rae/v1/post of the component REST API. The manipulation of the argument post_id/post_slug results in information disclosure. The attack may be launched remotely. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
A security vulnerability has been identified in the Headless CMS Plugin for WordPress, affecting versions through 2.0.4. The issue arises in the REST API component, specifically within the 'get_required_post_data' function of the '/wp-json/rae/v1/post' endpoint. The vulnerability allows for unauthorized information disclosure by manipulating the 'post_id' or 'post_slug' arguments. This flaw can be exploited remotely, and the published exploit indicates that it may be actively used in attacks.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Nov 3, 2026CISA-ADP
Assessed Nov 3, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://app.notion.com/p/Unauthenticated-disclosure-of-draft-private-and-future-post-contentimranhsayed-headless-cms-2-0-4-3f384f1ea6a48057bb67ed0dd89f4157?source=copy_link | [email protected] | |
| https://vuldb.com/cve/CVE-2026-121509 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/submit/1019400 | [email protected] | Issue TrackingPermission Required |
| https://vuldb.com/vuln/430285 | [email protected] | Content Wall |
| https://vuldb.com/vuln/430285/cti | [email protected] | Content Wall |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-200 | Exposure of Sensitive Information to an Unauthorized Actor | [email protected] |
| CWE-284 | Improper Access Control | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Headless CMS Plugin | <= 2.0.4 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Nov 3, 2026 | CVE Modified | CISA-ADP |
| Nov 3, 2026 | New CVE Received | [email protected] |