CVE-2026-86786 in Slider Pro Plugin
Summary
by MITRE • 10/06/2026
The Slider Pro WordPress plugin through 1.0.0 does not perform any capability or authorisation check on one of its AJAX actions, allowing unauthenticated users to retrieve the title, excerpt and permalink of non-public posts, including drafts, pending, scheduled, private and trashed posts, as well as post revisions and media metadata.
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Analysis
by VulDB Data Team • 10/06/2026
The vulnerability identified in Slider Pro WordPress plugin versions up to 1.0.0 represents a critical failure in access control mechanisms within the application's AJAX handler architecture. This flaw stems from an absence of capability or authorization checks when processing specific AJAX requests initiated by unauthenticated users. In standard web application security models, particularly those built on frameworks like WordPress, any action that interacts with backend data structures must verify that the requesting user possesses sufficient privileges to perform the operation. The lack of such verification in this plugin allows external actors to bypass authentication entirely and execute administrative or restricted queries against the database. This type of vulnerability is fundamentally categorized under CWE-285 Improper Authorization, as it permits actions to be performed by users who have not been authenticated or authorized for those specific operations.
The operational impact of this flaw is significant due to the breadth of data exposed through the vulnerable endpoint. Unauthenticated attackers can retrieve sensitive metadata associated with posts that are typically hidden from public view. This includes titles and excerpts belonging to drafts, pending review items, scheduled future publications, private posts intended for restricted audiences, and even trashed content that has been marked for deletion but not yet purged from the database. Furthermore, the vulnerability extends beyond standard post data to include revisions of posts and metadata associated with media files uploaded through the WordPress environment. This comprehensive exposure means that an attacker can map out the internal structure of a website, identify unpublished strategies or communications contained in drafts, and gather detailed information about multimedia assets which may contain sensitive context or embedded data.
From a threat intelligence perspective, this vulnerability aligns closely with MITRE ATT&CK technique T1087.2 Account Discovery: Local Account, although adapted for web application contexts where the discovery of content metadata serves as a precursor to further exploitation. The ability to enumerate non-public posts allows attackers to perform reconnaissance that can facilitate more targeted attacks such as social engineering or credential stuffing if usernames are embedded in post authorship data. Additionally, access to media metadata might reveal file paths or internal identifiers that could be leveraged for path traversal or remote code execution attempts if other vulnerabilities exist within the hosting environment. The exposure of scheduled posts is particularly concerning for organizations relying on WordPress for content management workflows, as it reveals future business plans or announcements before they are intended to go public.
Mitigation strategies must address both immediate remediation and long-term architectural improvements. The primary solution involves upgrading Slider Pro to a version where the developer has implemented proper capability checks using standard WordPress functions such as current_user_can() within the AJAX handler responsible for retrieving post data. Until an update is available, administrators should consider disabling the specific AJAX endpoint if it is not actively required by legitimate users, or restricting access via web application firewall rules that block unauthenticated requests to known vulnerable endpoints. Furthermore, organizations should audit their WordPress installations for other plugins with similar patterns of missing authorization checks in AJAX handlers. Regular security audits and penetration testing focused on authentication bypasses are essential to identify such gaps before they can be exploited by malicious actors seeking to harvest sensitive organizational data.