EUVD-2026-60899
GHSA-fvcm-5qh8-pf9f
Severity by source
AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Network-reachable upload handler needs only a Contributor account (PR:L) and no interaction; unrestricted upload yields RCE affecting the whole host, so scope changes and C/I/A are all High.
Primary rating from Vendor (Patchstack).
CVSS VectorVendor: Patchstack
Lifecycle Timeline
2DescriptionCVE.org
Contributor Arbitrary File Upload in Sync Post With Other Site <= 1.9.3 versions.
AnalysisAI
Arbitrary file upload in the WordPress plugin Sync Post With Other Site (versions 1.9.3 and earlier) lets a user holding only Contributor-level privileges upload files of any type, including PHP webshells, bypassing WordPress's normal media-type restrictions. Because the flaw carries a scope-changed CVSS 3.1 score of 9.9, a successful upload typically escalates to remote code execution and full site compromise. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated WordPress account with at least Contributor privileges on a site running Sync Post With Other Site version 1.9.3 or earlier (PR:L in the CVSS vector), and the ability to reach the plugin's file-upload handler over the network (AV:N) with no victim interaction (UI:N). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H (9.9 Critical) indicates network-reachable, low-complexity exploitation requiring only low privileges and no user interaction, with total confidentiality, integrity, and availability impact across a changed scope - consistent with file-upload-to-RCE. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No vendor-released patch version was identified in the provided data; if the plugin author has published a release later than 1.9.3, upgrade to that fixed version and confirm it against the Patchstack advisory at https://patchstack.com/database/wordpress/plugin/sync-post-with-other-site/vulnerability/wordpress-sync-post-with-other-site-plugin-1-9-3-arbitrary-file-upload-vulnerability. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: immediately deactivate and remove the Sync Post With Other Site plugin from all WordPress installations, then delete the plugin directory via SFTP or hosting control panel. …
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External POC / Exploit Code
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