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Vulnerability record · CVE-2021-36884 · published 19 November 2021

CVE-2021-36884: Backupbliss backup migration cross-site scripting vulnerability

Backupbliss · Backup Migration

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

5.4 CVSS 3.1 Medium EPSS 0.57% · top 55.0% CWE-79 · Cross-site scripting
5.4CVSS 3.1 base score, v2 3.5
0.57%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

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

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://patchstack.com/database/vulnerability/backup-backup/wordpress-backup-migration-plugin-1-1-5-authenticated-persis PatchThird Party Advisory
https://wordpress.org/plugins/backup-backup/#developers Third Party Advisory
https://patchstack.com/database/vulnerability/backup-backup/wordpress-backup-migration-plugin-1-1-5-authenticated-persis PatchThird Party Advisory
https://wordpress.org/plugins/backup-backup/#developers Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2023-6971Backupbliss backup migration inclusion from untrusted sphere vulnerabilityThe Backup Migration plugin for WordPress is vulnerable to Remote File Inclusion in versions 1.0.8 to 1.3.9 via the 'content-dir' HTTP header. This m…EPSS 6.4%9.8CVE-2023-6972Backupbliss backup migration path traversal vulnerabilityThe Backup Migration plugin for WordPress is vulnerable to Path Traversal in all versions up to, and including, 1.3.9 via the 'content-backups' and '…EPSS 1.4%9.8CVE-2023-6553Backup Migration WordPress plugin unauthenticated remote code executionThe Backup Migration plugin for WordPress, in versions up to and including 1.3.7, passes attacker-controlled values into an include in /includes/back…EPSS 98%analysed7.5CVE-2023-6266Backupbliss backup migration information exposure vulnerabilityThe Backup Migration plugin for WordPress is vulnerable to unauthorized access of data due to insufficient path and file validation on the BMI_BACKUP…EPSS 2.1%7.5CVE-2023-6271Backupbliss backup migration vulnerabilityThe Backup Migration WordPress plugin before 1.3.6 stores in-progress backups information in easy to find, publicly-accessible files, which may allow…EPSS 0.69%7.2CVE-2023-7002Backupbliss backup migration os command injection vulnerabilityThe Backup Migration plugin for WordPress is vulnerable to OS Command Injection in all versions up to, and including, 1.3.9 via the 'url' parameter. …EPSS 31%6.5CVE-2023-0958Backupbliss backup migration missing authorization vulnerabilitySeveral plugins for WordPress by Inisev are vulnerable to unauthorized installation of plugins due to a missing capability check on the handle_instal…EPSS 0.69%4.3CVE-2023-3977Backupbliss backup migration cross-site request forgery vulnerabilitySeveral plugins for WordPress by Inisev are vulnerable to Cross-Site Request Forgery to unauthorized installation of plugins due to a missing nonce c…EPSS 0.61%

Source: NIST National Vulnerability Database (record CVE-2021-36884), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.