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

Quick assessment

Affected

n/a Headless CMS Plugin

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 WordPress 平台的 Headless CMS 插件（版本 2.0.4 及以下）中发现了一个安全漏洞。该漏洞影响其 REST API 组件中文件内的函数。攻击者可通过操纵或参数，导致信息泄露。此攻击可远程发起，且利用代码已公开，可能被用于实际攻击。厂商虽在漏洞披露初期即收到通知，但至今未作任何回应。

CVSS 5.3 · Medium Updated Nov 04, 2026

Possible ATT&CK Techniques 2 AI

T1190 · Exploit Public-Facing Application T1068 · Exploitation for Privilege Escalation

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Vulnerability Information

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Vulnerability Title

Headless CMS Plugin REST API post get_required_post_data information disclosure

Source: CVE Program / CVE List V5

Vulnerability 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.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Source: CVE Program / CVE List V5

Vulnerability Type

信息暴露

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
-	Headless CMS Plugin	2.0.0	`cpe:2.3:a:headless_cms_plugin:headless_cms_plugin::::::::`

II. Public POCs for CVE-2026-121509

#	POC Description	Source Link	Shenlong Link

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No public POC found.

III. Intelligence Information for CVE-2026-121509

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Other References for CVE-2026-121509 (5)

https://app.notion.com/p/Unauthenticated-disclosure-of-draft-private-and-future-post-contentimranhsayed-headless-cms-2-0-4-3f384f1ea6a48057bb67ed0dd89f4157?source=copy_link exploit
https://vuldb.com/cve/CVE-2026-121509 third-party-advisory
https://vuldb.com/vuln/430285/cti signature permissions-required
https://vuldb.com/vuln/430285 vdb-entry technical-description
https://vuldb.com/submit/1019400 third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-121509

Same Patch Batch · n/a · 2026-11-03 · 9 CVEs total

CVE-2026-106991	7.1 HIGH	HustOJ 24.09.10-26.08.19 任意用户操作漏洞
CVE-2026-121582	6.5 MEDIUM	Umami Record API Endpoint route.ts authorization
CVE-2026-121531	6.3 MEDIUM	Umami 2FA Policy route.ts single-factor authentication
CVE-2026-121517	5.0 MEDIUM	IrfanView TIFF Wang Annotation heap-based overflow
CVE-2026-121581	4.3 MEDIUM	ArcReel Provider Test-Connection Endpoint test server-side request forgery
CVE-2026-38595		im3x Scriptables v2-dev 任意文件上传命令注入漏洞
CVE-2026-38600		codeskyblue gohttpserver v1.3.0 存在 Zip Slip 漏洞
CVE-2026-38601		codeskyblue v1.3.0 硬编码密钥导致身份伪造漏洞

IV. Related Vulnerabilities

Same vendor: n/a

Same weakness: CWE-200