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CVE-2026-77001 – Authentication Bypass / Full Site Takeover – Social Login & Sharing buttons with An

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Summary

CVE-2026-77001 is a critical authentication bypass vulnerability (CWE-287: Improper Authentication) affecting the "Social Login & Sharing buttons with Analytics By SoClever" WordPress plugin, versions through 1.2.0. The flaw allows a completely unauthenticated remote attacker to obtain a valid, authenticated session as any existing WordPress user — including administrators — without supplying any credentials. Given the CVSS v3.1 base score of 9.8 (Critical), successful exploitation results in full compromise of confidentiality, integrity, and availability of the affected WordPress site.

Technical details

  • Root cause: The plugin exposes a publicly accessible login/session-handling code path that fails to perform proper authentication checks, authorization checks, or WordPress nonce validation before establishing a logged-in session for a targeted user account.
  • Trigger conditions: No authentication or prior access is required; the vulnerable handler is reachable by any unauthenticated visitor to a WordPress site running the affected plugin.
  • Attack vector: Network-based (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction required (UI:N) — the attacker can exploit this remotely by directly interacting with the plugin’s exposed endpoint.
  • Impact: An attacker can impersonate any existing site user, including administrators, effectively achieving full account takeover and complete control over the WordPress installation (content, plugins, themes, users, and potentially the underlying server depending on further chained abuse).

Affected software

  • Social Login & Sharing buttons with Analytics By SoClever (WordPress plugin) — versions 0 through 1.2.0 (inclusive), i.e., all publicly released versions up to and including 1.2.0.

Severity

  • CVSS v3.1 Base Score: 9.8 (Critical)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Mitigation and recommended actions

  • Immediate: As of this writing, no confirmed patched version of the plugin has been publicly identified. Security teams should verify with the plugin vendor/WordPress.org repository whether an updated release beyond 1.2.0 has been published, and apply it immediately once available.
  • If no patch is available:
    • Deactivate and remove the "Social Login & Sharing buttons with Analytics By SoClever" plugin from all WordPress installations until a fix is released.
    • Audit WordPress user accounts and administrator sessions for signs of unauthorized access or unexpected logins.
    • Force-reset credentials and invalidate active sessions for all users, particularly administrators, on affected sites.
    • Restrict or block external access to the plugin’s endpoints at the web server or WAF layer as an interim compensating control.
    • Monitor site logs for anomalous authentication activity and unexpected administrative actions as an indicator of exploitation attempts.

References

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