EUVD-2026-80769
GHSA-6r37-32vj-mjwv
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-reachable AJAX endpoint with low complexity but requires an authenticated edit_posts user (PR:L); impact is limited to low confidentiality (user enumeration), so I:N and A:N.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
2DescriptionCVE.org
Adenion Blog2Social plugin for WordPress before 9.1.0 allows low-privileged users to enumerate WordPress user accounts. The b2s_get_select_mandant_user AJAX handler in includes/Ajax/Get.php resolves arbitrary user IDs supplied in the owner parameter to display names without verifying that the caller is authorized to read user account data, allowing any user with the edit_posts capability to map WordPress user IDs to display names and confirm account existence for arbitrary IDs.
AnalysisAI
User account enumeration in the Adenion Blog2Social plugin for WordPress before 9.1.0 lets any authenticated user holding the edit_posts capability - such as a Contributor, Author, Editor, or Administrator - resolve arbitrary numeric user IDs to their display names and confirm whether those accounts exist. The bug is an authorization bypass through a user-controlled key (CWE-639) in the b2s_get_select_mandant_user AJAX handler, which returns user data for the attacker-supplied owner parameter without checking that the caller is allowed to read account information; the CVSS 4.0 base score is 5.3 (Medium) and the assessed CVSS 3.1 vector is AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N, meaning confidentiality-only impact with no modification or availability effect. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires an authenticated WordPress account with the edit_posts capability (Contributor, Author, Editor, or Administrator role) on a site running Blog2Social before 9.1.0; the attacker sends requests to the b2s_get_select_mandant_user AJAX handler supplying arbitrary IDs in the owner parameter. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine but low-severity information-exposure issue, correctly rated CVSS 4.0 5.3 (Medium). … 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 | Vendor-released patch: 9.1.0 - upgrade Blog2Social to 9.1.0 or later through the WordPress admin Plugins screen (or the plugin page at https://wordpress.org/plugins/blog2social/#developers) and confirm the version string in the Plugins list before considering the finding closed; patching is the only complete fix because it restores the missing authorization check in b2s_get_select_mandant_user. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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