Vulnerability: CVE-2026-24636 (Medium severity, CVSS 4.3) impacts Sugar Calendar (Lite) – Events Calendar, Event Tickets, and Events Management Platform (slug: sugar-calendar-lite) in versions up to and including 3.9.1. The issue is a missing authorization check that can enable certain authenticated users to perform an unauthorized action.

Reference: CVE-2026-24636 | Wordfence advisory

Attack Vectors

This vulnerability is remotely exploitable over the network and does not require user interaction once an attacker is logged in (CVSS indicates UI:N). The primary attack path is through a compromised or malicious authenticated WordPress account with at least contributor-level access (PR:L) or higher.

In practical business terms, this means the risk often rises when organizations have many user accounts (internal staff, agencies, contractors, temporary contributors) or when credentials are reused and later exposed through phishing or third-party breaches.

Security Weakness

Sugar Calendar (Lite) versions up to 3.9.1 are reported as vulnerable due to a missing capability check on a function. Capability checks are how WordPress enforces “who is allowed to do what” inside the admin and plugin features.

When a capability check is missing, a user who should not be permitted to execute a sensitive action may still be able to do so—creating a gap between your intended role-based access policy (e.g., contributor vs. editor vs. admin) and what the software actually enforces.

Remediation: Update Sugar Calendar (Lite) to version 3.10.0 or any newer patched version.

Technical or Business Impacts

Because the advisory describes the outcome as an “unauthorized action” (without detailing the exact action), the safest way to view the risk is as an integrity and governance issue: actions in the plugin’s operational scope could be performed by users who shouldn’t have that authority.

For marketing, operations, and finance leaders, the business exposure typically includes:

• Process disruption: If unauthorized actions affect event operations, it can create last-minute changes, internal confusion, and avoidable support overhead.
• Brand and customer trust risk: Any visible inconsistency in event or ticketing workflows can erode confidence, especially during time-sensitive campaigns.
• Audit and compliance concerns: When role-based controls don’t behave as expected, it can complicate access reviews and accountability expectations for compliance teams.

Even at Medium severity, this class of issue is often exploited opportunistically once an attacker gains any low-privileged login—so it’s best treated as a prioritized maintenance update, not a “wait until later” item.

Similar Attacks

Missing or broken authorization checks are a recurring theme in web and WordPress security. A few widely referenced examples include:

CVE-2017-1001000 — WordPress REST API content injection (authorization-related issue impacting content integrity).
CVE-2018-19207 — WP GDPR Compliance plugin issue that allowed unauthorized actions due to insufficient access control.