CVE-2021-36884 MEDIUM

CVE-2021-36884: WordPress Backup Migration plugin <= 1.1.5 - Authenticated Persistent Cross-Site Scripting (XSS) vulnerability

Vendor Backupbliss
Product Backup Migration (WordPress plugin)
Weakness CWE-79 · XSS
Published November 19, 2021
Last update April 28, 2026
View on NVD All CVEs

CVSS base score

4.8/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction Required
Confidentiality Low
Integrity Low

CVSS vector

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

What the vulnerability does

01Description

Authenticated Persistent Cross-Site Scripting (XSS) vulnerability discovered in WordPress Backup Migration plugin <= 1.1.5 versions.

Explanation of Vulnerability in Simple Terms

02Summary

The Backup Migration WordPress plugin version 1.1.5 and earlier contains a stored cross-site scripting (XSS) vulnerability. An authenticated administrator with high privileges can inject malicious scripts through the plugin interface. When other users view affected pages, the scripts execute in their browsers, potentially compromising their sessions or stealing data. The vulnerability requires user interaction and affects the scope beyond the plugin itself.

What an attacker can do

03Attacker Capabilities

Inject malicious scripts that execute in other users' browsers when they view affected pages.

Potential impact on your site

04Site Impact

Compromised admin accounts could inject persistent malicious code affecting all site visitors and administrators.

Conditions required to exploit

05Prerequisites

Attacker must be an authenticated administrator; victim must visit a page containing the injected script.

Key dates

06Disclosure timeline

November 19, 2021 CVE published
April 28, 2026 Record updated

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08Related CVE

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