CVE-2022-0364

Modern Events Calendar Lite <= 6.3.0 - Stored Cross-Site Scripting

2022-02-28 00:00

Strategic Overview

Status: Patched in 6.4.0
Affected Plugin: Modern Events Calendar Lite
Affected Version: <= 6.3.0
CVSS: 6.4Medium
Weakness type: CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE: CVE-2022-0364

View all Modern Events Calendar Lite vulnerabilities

At a glance

CVE-2022-0364 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Modern Events Calendar Lite WordPress plugin, affecting versions <= 6.3.0. It carries a CVSS score of 6.4 (reachable over the network; low attack complexity). The issue is fixed in version 6.4.0; sites on affected versions should update now. Disclosed February 2022, reported by Rohan Chaudhari.

Vulnerability Overview

The Modern Events Calendar Lite WordPress plugin before 6.4.0 does not sanitize and escape some of the Hourly Schedule parameters which could allow users with a role as low as contributor to perform Stored Cross-Site Scripting attacks

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-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Reaching this weakness in Modern Events Calendar Lite <= 6.3.0 takes a caller who can reach the endpoint. Cross-site scripting happens when input from a request is written into a page without being escaped for the context it lands in, so the browser parses attacker-supplied text as markup or script.

Injected script runs with the privileges of whoever views the affected page, which is how these flaws turn into administrator session theft, silent account creation or persistent backdoors in page content. For Modern Events Calendar Lite the fix is 6.4.0: builds <= 6.3.0 are affected, anything from 6.4.0 onward is not.

Remediation

Update to version 6.4.0, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Modern Events Calendar Lite: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Modern Events Calendar Lite 6.4.0 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2022-0364 https://www.wordfence.com/threat-intel/vulnerabilities/id/48bf9bf4-1b8a-41cc-adc9-a618d075c7f2 https://nvd.nist.gov/vuln/detail/CVE-2022-0364

Related records

Same weakness class

Other vulnerabilities in Modern Events Calendar Lite

CVSS Vector

6.4

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeChanged
ConfidentialityLow
IntegrityLow
AvailabilityNone

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