CVE-2026-48838 HIGH

CVE-2026-48838: WordPress Post SMTP plugin <= 3.6.2 - Cross Site Scripting (XSS) vulnerability

Vendor Wpexperts

Product Post SMTP

Weakness CWE-79 · XSS

Published June 15, 2026

Last update June 16, 2026

View on NVD All CVEs

CVSS base score

7.1/10

Attack vector Network

Attack complexity Low

Privileges required None

User interaction Required

Confidentiality Low

Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

What the vulnerability does

01Description

Unauthenticated Cross Site Scripting (XSS) in Post SMTP <= 3.6.2 versions.

Explanation of Vulnerability in Simple Terms

02Summary

Post SMTP versions up to 3.6.2 contain a cross-site scripting (XSS) vulnerability that allows attackers to inject malicious scripts into the site. An attacker can craft a malicious link or page that, when visited by a site administrator or user, executes arbitrary JavaScript in their browser. This can lead to session hijacking, credential theft, or unauthorized actions performed on behalf of the victim.

What an attacker can do

03Attacker Capabilities

Inject and execute malicious JavaScript in a user's browser to steal credentials or perform unauthorized actions.

Potential impact on your site

04Site Impact

Administrators and users visiting crafted links risk session hijacking, credential theft, and unauthorized site modifications.

Conditions required to exploit

05Prerequisites

Attacker must trick a user into visiting a malicious link or page (user interaction required). No authentication needed.

Key dates

06Disclosure timeline

June 15, 2026 CVE published

June 16, 2026 Record updated

External resources

07References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2026-48838 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/79.html AskarLabs — CWE-79 write-up Cross-Site Scripting

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