POST SMTP Plugin up to 2.8.6 on WordPress msg cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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4.7$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in POST SMTP Plugin up to 2.8.6 on WordPress. The affected element is an unknown function. This manipulation of the argument msg causes cross site scripting. This vulnerability is tracked as CVE-2023-6621. The attack is possible to be carried out remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in POST SMTP Plugin up to 2.8.6 on WordPress (WordPress Plugin). Affected by this vulnerability is an unknown functionality. The manipulation of the argument msg 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 summary by CVE is:

The POST SMTP WordPress plugin before 2.8.7 does not sanitise and escape the msg parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting which could be used against high privilege users such as admin.

The weakness was disclosed 01/03/2024 by Alex Sanford. It is possible to read the advisory at wpscan.com. This vulnerability is known as CVE-2023-6621 since 12/08/2023. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

Upgrading to version 2.8.7 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-58844). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.7

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

NVD Base Score: 6.1
NVD Vector: 🔍

CVSSv2info

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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: POST SMTP Plugin 2.8.7

Timelineinfo

12/08/2023 🔍
01/03/2024 +26 days 🔍
01/03/2024 +0 days 🔍
06/19/2025 +533 days 🔍

Sourcesinfo

Advisory: wpscan.com
Researcher: Alex Sanford
Status: Confirmed

CVE: CVE-2023-6621 (🔍)
GCVE (CVE): GCVE-0-2023-6621
GCVE (VulDB): GCVE-100-249607
EUVD: 🔍

Entryinfo

Created: 01/03/2024 11:02
Updated: 06/19/2025 03:47
Changes: 01/03/2024 11:02 (42), 01/23/2024 15:03 (11), 06/18/2025 21:01 (16), 06/19/2025 03:47 (1)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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