CVE-2026-57630: Blocksy Companion Pro IDOR Vulnerability—Unauthenticated Data Access Flaw

Technical summary

The vulnerability is classified as CWE-639 (Authorization Bypass Through User-Controlled Key) and manifests as an unauthenticated IDOR flaw in Blocksy Companion Pro. The affected versions (2.1.46 and earlier) fail to properly validate that the requesting user has authorization to access the specific objects they reference. An attacker can craft requests to enumerate or retrieve sensitive data by manipulating object identifiers in the API or endpoint parameters. The CVSS 3.1 score of 5.3 (Medium severity) reflects low attack complexity and network accessibility, with impact limited to confidentiality—no integrity or availability compromise occurs through this vector alone.

Business impact

Organizations using vulnerable versions of Blocksy Companion Pro risk exposure of sensitive customer or internal data. Depending on the nature of the accessible objects (user profiles, private content, configuration details), this could lead to privacy violations, regulatory non-compliance (GDPR, CCPA, etc.), reputational damage, and loss of customer trust. The ease of exploitation means attackers can systematically harvest data at scale without detection if monitoring is insufficient.

Affected systems

Blocksy Companion Pro versions 2.1.46 and earlier are affected. Users running later versions are not impacted. If you use Blocksy Companion Pro in a WordPress environment, verify your installed version against the 2.1.46 threshold.

Exploitability

This vulnerability is highly exploitable. It requires no authentication, user interaction, or special privileges. An attacker needs only network access and can exploit it through straightforward HTTP requests, making it accessible to threat actors with minimal skill. The absence of KEV (Known Exploited Vulnerability) designation does not indicate difficulty; it reflects current threat intelligence collection status and may change if exploitation becomes publicly demonstrated.

Remediation

Upgrade Blocksy Companion Pro to a version newer than 2.1.46. Vendors typically release security patches in maintenance releases following vulnerability disclosure. Check the official Blocksy plugin repository or vendor security advisory for the specific patched version available for your installation. After upgrading, verify the update completed successfully and review access logs for evidence of prior exploitation.

Patch guidance

Visit the Blocksy official website or WordPress plugin directory to confirm the latest available version and download it directly from the vendor. Update through your WordPress admin panel's plugin update interface when available, or manually deploy the patched version. Test the update in a staging environment first if possible. Verify the new version number post-update to confirm the patch was applied. Document the patch date and version for compliance records.

Detection guidance

Monitor application logs for unusual patterns of object access—such as sequential or non-sequential ID enumeration in API requests—particularly from unauthenticated sessions. Look for HTTP requests with parameters containing numeric IDs, UUIDs, or resource identifiers that appear to access data outside the requester's normal scope. Web application firewalls (WAFs) and API security tools can detect IDOR exploitation by analyzing request patterns. If available, enable detailed logging on Blocksy Companion Pro endpoints and correlate with failed authorization events.

Why prioritize this

This vulnerability warrants timely but not emergency patching. The Medium CVSS score and lack of active exploitation (KEV status: false) position it as important but lower-priority than Critical or High-severity flaws. However, the ease of exploitation and confidentiality impact mean it should be addressed within your standard patching cycle—typically 30–60 days. Prioritize higher if your Blocksy installation processes or displays sensitive user data.

Risk score, explained

The CVSS 3.1 score of 5.3 reflects: Network accessibility (AV:N) with low attack complexity (AC:L), no authentication required (PR:N), no user interaction needed (UI:N), and limited scope (S:U). The confidentiality impact (C:L) acknowledges data disclosure potential, while integrity and availability remain unaffected by this specific flaw. The score would be higher if the vulnerability enabled data modification or system disruption.

Frequently asked questions