Modern Events Calendar Lite Plugin up to 7.0.x on WordPress cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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3.8$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Modern Events Calendar Lite Plugin up to 7.0.x on WordPress. This vulnerability affects unknown code. Performing a manipulation results in cross site scripting. This vulnerability is reported as CVE-2023-4021. The attack is possible to be carried out remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Modern Events Calendar Lite Plugin up to 7.0.x on WordPress (Calendar Software). It has been classified as problematic. This affects some unknown functionality. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. The summary by CVE is:

The Modern Events Calendar lite plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Google API key and Calendar ID in versions up to, but not including, 7.1.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.

The weakness was disclosed 09/28/2023. The advisory is shared at wordfence.com. This vulnerability is uniquely identified as CVE-2023-4021 since 07/31/2023. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

Upgrading to version 7.1.0 eliminates this vulnerability.

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Productinfo

Type

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.9
VulDB Meta Temp Score: 3.8

VulDB Base Score: 2.4
VulDB Temp Score: 2.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.8
NVD Vector: 🔍

CNA Base Score: 4.4
CNA Vector: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Modern Events Calendar Lite Plugin 7.1.0

Timelineinfo

07/31/2023 🔍
09/28/2023 +59 days 🔍
09/28/2023 +0 days 🔍
04/10/2026 +925 days 🔍

Sourcesinfo

Advisory: wordfence.com
Status: Confirmed

CVE: CVE-2023-4021 (🔍)
GCVE (CVE): GCVE-0-2023-4021
GCVE (VulDB): GCVE-100-240837

Entryinfo

Created: 09/28/2023 23:34
Updated: 04/10/2026 22:11
Changes: 09/28/2023 23:34 (39), 04/10/2026 22:11 (37)
Complete: 🔍
Cache ID: 216::103

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