CVE-2025-3527

EventON - WordPress Virtual Event Calendar Plugin <= 4.9.6 - Missing Authorization to Authenticated (Subscriber+) Stored Cross-Site Scripting

2025-05-16 00:00
Nguyễn Trung Kiên

Strategic Overview

Status
Patched in 4.9.7
Affected Plugin
EventON (Pro) - WordPress Virtual Event Calendar Plugin
Affected Version
<= 4.9.6
CVSS
6.4Medium
Weakness type
CWE-862 · Missing Authorization
CVE
CVE-2025-3527
View all EventON (Pro) - WordPress Virtual Event Calendar Plugin vulnerabilities

At a glance

CVE-2025-3527 is a medium-severity Missing Authorization vulnerability in the EventON (Pro) - WordPress Virtual Event Calendar Plugin WordPress plugin, affecting versions <= 4.9.6. It carries a CVSS score of 6.4 (reachable over the network; low attack complexity). Exploitation requires an authenticated account at Subscriber level or above. The issue is fixed in version 4.9.7; sites on affected versions should update now. Disclosed May 2025, reported by Nguyễn Trung Kiên.

Vulnerability Overview

The EventON Pro plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check in the 'assets/lib/settings/settings.js' file in all versions up to, and including, 4.9.6. This makes it possible for authenticated attackers, with Subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The vulnerability was partially patched in version 4.9.6.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user.

CWE-862: Missing Authorization

Reaching this weakness in EventON (Pro) - WordPress Virtual Event Calendar Plugin <= 4.9.6 takes an account at Subscriber level or above. A missing authorization check means a function is reachable by anyone who can reach the endpoint, because the code never asks whether the caller is allowed to perform the action.

Any user who can reach the endpoint gets to run an action reserved for higher-privileged roles, from reading protected data to changing settings or content. For EventON (Pro) - WordPress Virtual Event Calendar Plugin the fix is 4.9.7: builds <= 4.9.6 are affected, anything from 4.9.7 onward is not.

Remediation

Update to version 4.9.7, or a newer patched version

How does WordSec protect against this?

Because it turns on account access, WordSec's login security is the relevant layer: role-based two-factor, captcha and brute-force limits raise the cost of getting the account this needs. None of that substitutes for the fix: EventON (Pro) - WordPress Virtual Event Calendar Plugin 4.9.7 closes this, and updating the plugin is the step that ends it.

  • Login Security
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2025-3527https://www.wordfence.com/threat-intel/vulnerabilities/id/549ca9cf-0183-4c19-9bd5-b6d55a69df31https://nvd.nist.gov/vuln/detail/CVE-2025-3527

Related records

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