VDB-187309 · CVE-2021-24927 · GCVE-0-2021-24927

My Calendar Plugin prior 3.2.18 on WordPress AJAX Action mc_post_lookup callback cross site scripting

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.4	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in My Calendar Plugin on WordPress and classified as problematic. Affected by this issue is the function mc_post_lookup of the component AJAX Action Handler. This manipulation of the argument callback causes cross site scripting. The identification of this vulnerability is CVE-2021-24927. It is possible to initiate the attack remotely. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic was found in My Calendar Plugin on WordPress (Calendar Software). Affected by this vulnerability is the function mc_post_lookup of the component AJAX Action Handler. The manipulation of the argument callback with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect integrity.

The weakness was shared 11/29/2021. The advisory is shared at wpscan.com. This vulnerability is known as CVE-2021-24927 since 01/14/2021. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

Upgrading to version 3.2.18 eliminates this vulnerability.

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Productinfo

Type

Calendar Software

Name

My Calendar Plugin

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.4

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.4
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
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Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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

NVD Base Score: 🔍

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: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: My Calendar Plugin 3.2.18

Timelineinfo

01/14/2021 🔍
11/29/2021 +319 days 🔍
11/29/2021 +0 days 🔍
12/02/2021 +3 days 🔍

Sourcesinfo

Advisory: wpscan.com
Status: Confirmed

CVE: CVE-2021-24927 (🔍)
GCVE (CVE): GCVE-0-2021-24927
GCVE (VulDB): GCVE-100-187309

Entryinfo

Created: 11/29/2021 16:20
Updated: 12/02/2021 16:45
Changes: 11/29/2021 16:20 (41), 12/02/2021 16:38 (1), 12/02/2021 16:45 (18)
Complete: 🔍
Cache ID: 216::103