CVE-2023-6621

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.

CVSS v3 6.1 MEDIUM

6.1^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://wpscan.com/vulnerability/b49ca336-5bc2-4d72-a9a5-b8c020057928	Exploit Third Party Advisory
https://wpscan.com/vulnerability/b49ca336-5bc2-4d72-a9a5-b8c020057928	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

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

History

21 Nov 2024, 08:44

Type	Values Removed	Values Added
References	~~() https://wpscan.com/vulnerability/b49ca336-5bc2-4d72-a9a5-b8c020057928 - Exploit, Third Party Advisory~~	() https://wpscan.com/vulnerability/b49ca336-5bc2-4d72-a9a5-b8c020057928 - Exploit, Third Party Advisory

09 Jan 2024, 18:47

Type	Values Removed	Values Added
References	~~() https://wpscan.com/vulnerability/b49ca336-5bc2-4d72-a9a5-b8c020057928 -~~	() https://wpscan.com/vulnerability/b49ca336-5bc2-4d72-a9a5-b8c020057928 - Exploit, Third Party Advisory
CPE		cpe:2.3:a:wpexperts:post_smtp::::::wordpress::*
CWE		CWE-79
First Time		Wpexperts Wpexperts post Smtp
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 6.1

03 Jan 2024, 09:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2024-01-03 09:15

Updated : 2025-06-18 16:15

NVD link : CVE-2023-6621

Mitre link : CVE-2023-6621

CVE.ORG link : CVE-2023-6621

JSON object : View

Products Affected

wpexperts

post_smtp

CWE

CWE-79

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

{"id": "CVE-2023-6621", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 6.1, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 2.7, "exploitabilityScore": 2.8}, {"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 6.1, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 2.7, "exploitabilityScore": 2.8}]}, "published": "2024-01-03T09:15:11.440", "references": [{"url": "https://wpscan.com/vulnerability/b49ca336-5bc2-4d72-a9a5-b8c020057928", "tags": ["Exploit", "Third Party Advisory"], "source": "contact@wpscan.com"}, {"url": "https://wpscan.com/vulnerability/b49ca336-5bc2-4d72-a9a5-b8c020057928", "tags": ["Exploit", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-79"}]}, {"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-79"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "POST SMTP WordPress plugin anterior a 2.8.7 no sanitiza ni escapa el par\u00e1metro msg antes de devolverlo a la p\u00e1gina, lo que genera cross site scripting reflejado que podr\u00eda usarse contra usuarios con privilegios elevados, como el administrador."}], "lastModified": "2025-06-18T16:15:24.997", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:wpexperts:post_smtp:*:*:*:*:*:wordpress:*:*", "vulnerable": true, "matchCriteriaId": "00068F78-E905-4A92-8286-F98BDBD96103", "versionEndExcluding": "2.8.7"}], "operator": "OR"}]}], "sourceIdentifier": "contact@wpscan.com"}