Easy Post Submission <= 2.3.0 - Missing Authorization
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-862.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| ThemeRuby | Easy Post Submission – Frontend Posting, Guest Publishing & Submit Content for WordPress | up to 2.3.0 | — | No fix listed | CNA |
- Easy Post Submission – Frontend Posting, Guest Publishing & Submit Content for WordPress VendorThemeRuby Affected up to 2.3.0 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-4431
- 2026-10-03 Alias added: GHSA-hqvx-hxrc-x42r
References
Other 5
- https://www.wordfence.com/threat-intel/vulnerabilities/id/15494ccf-7c9d-4566-9e80-2da94172a3dd?source=cve
- https://plugins.trac.wordpress.org/browser/easy-post-submission/tags/2.2.0/includes/client-ajax-handler.php#L38
- https://plugins.trac.wordpress.org/browser/easy-post-submission/tags/2.2.0/includes/client-ajax-handler.php#L974
- https://plugins.trac.wordpress.org/browser/easy-post-submission/tags/2.2.0/includes/client-ajax-handler.php#L1157
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3488045%40easy-post-submission%2Ftrunk&old=3427523%40easy-post-submission%2Ftrunk
More ThemeRuby vulnerabilities
- TI-2024-24775 WordPress Foxiz Theme theme <= 2.3.5 - Server Side Request Forgery (SSRF) vulnerability CVSS 3.1CRITICAL 9.3
- TI-2026-18060 WordPress Easy Post Submission plugin <= 2.4.0 - Broken Access Control vulnerability CVSS 3.1HIGH 7.5
- TI-2026-00827 Cross-site scripting in ThemeRuby Multi Authors – Assign Multiple Writers to Posts CVSS 3.1MEDIUM 6.4
- TI-2025-38385 WordPress Easy Post Submission plugin <= 1.7.0 - Sensitive Data Exposure vulnerability CVSS 3.1MEDIUM 5.3
Sources
- CVE-2026-4431 · CVE Program
- CVE-2026-4431 · NVD
- FIRST EPSS
- GHSA-hqvx-hxrc-x42r · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences