Vulnerability · Published Nov 3, 2026 · Assigned by VulDB

CVE-2026-121509Headless CMS Plugin REST API post get_required_post_data information disclosure

Medium 5.3

In plain English

A medium-severity information exposure in Headless CMS Plugin. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 32% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.4%top 68.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
n/a	Headless CMS Plugin	2.0.02.0.12.0.22.0.32.0.4

Weakness: CWE-200, CWE-284 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:C

References

VDB-430285 | Headless CMS Plugin REST API post get_required_post_data information disclosure vdb-entry, technical-description
VDB-430285 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
CVE-2026-121509 | CVE Analysis and Report third-party-advisory
Submit #1019400 | Imran Sayed Headless CMS 2.0.4 Exposure of Sensitive Information to an Unauthorized Actor third-party-advisory
https://app.notion.com/p/Unauthenticated-disclosure-of-draft-private-and-future-post-contentimranhsayed-headless-cms-2-0-4-3f384f1ea6a48057bb67ed0dd89f4157?source=copy_link exploit