Easy Post Submission postId updates permit unauthenticated post tampering
Easy Post Submission through 2.3.0 exposes rbsm_submit_post through wp_ajax_nopriv_rbsm_submit_post. When an unauthenticated caller supplies postId, create_post() does not verify that the caller may edit the selected post. The attacker can overwrite arbitrary posts' titles, content, excerpts, categories and tags, or change the status to draft and effectively unpublish them. The CNA does not disclose the remaining field names or the lower-level post-update function.
- Component
- Easy Post Submission – Frontend Posting, Guest Publishing & Submit Content for WordPress
- Plugin slug
easy-post-submission- Affected
- <= 2.3.0
- Safe version
> 2.3.0- Published
- Aug 05, 2026
- Weakness
- CWE-862 — Missing Authorization
This CVE was published Aug 05, 2026 and is one of 3 known issues for this plugin.
Update, patch or deactivate.
Update Easy Post Submission to a release after 2.3.0. The authoritative record establishes the affected boundary but does not name the first fixed release. Audit post revisions, taxonomy changes and unexpected draft transitions, then restore altered content from a trusted revision or backup.
A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.
Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.
Technical description
The Easy Post Submission plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the `create_post()` function in all versions up to, and including, 2.3.0. This is due to the `rbsm_submit_post` AJAX action being registered for unauthenticated users via `wp_ajax_nopriv_rbsm_submit_post` without any authorization checks when a `postId` parameter is supplied. This makes it possible for unauthenticated attackers to modify the title, content, excerpt, categories, and tags of arbitrary posts, as well as change the post status to draft (effectively unpublishing them) via the 'postId' parameter.
CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H