CVE-2023-6621

Post SMTP < 2.8.7 - Reflected Cross-Site Scripting

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Published Jan 3, 2024 CVSS 3.1 · 6.1 Medium EPSS < 1% KEV · Not listed

Description

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.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Unknown

POST SMTP

unaffected

Version	Status	Constraints
`0`	affected	< 2.8.7

Configuration 1 [-]

cpe:2.3:a:wpexperts:post_smtp:*:*:*:*:*:wordpress:*:*

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

Source	ID	Title
EUVD	EUVD-2023-58844	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.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.401% probability within 30 days)

Exploitation poc

Automatable no

Technical Impact partial

References

Link	Providers
https://wpscan.com/vulnerability/b49ca336-5bc2-4d72-a9a5-b8c020057928

History

Jun 18, 2025 4:15 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Subscriptions

Wpexperts Post Smtp

Weaknesses

CWE-79

Sources

CVE record Updated: Jun 18, 2025, 3:36 PM

Status: PUBLISHED
Assigner: WPScan
Published: Jan 3, 2024, 8:32 AM
Updated: Jun 18, 2025, 3:36 PM
Reserved: Dec 8, 2023, 10:31 AM

View source JSON

Vulnrichment Updated: Aug 2, 2024, 8:35 AM

Updated: Aug 2, 2024, 8:35 AM

NVD Updated: Jun 17, 2026, 6:51 AM

Status: Modified
Published: Jan 3, 2024, 9:15 AM
Modified: Jun 17, 2026, 6:51 AM

View source JSON

Red Hat No data

No data.

OpenCVE enrichment No data

No data.

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