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Servers and applications · WordPress plugins

CVE-2021-24423

UpdraftPlus: WP Backup & Migration Plugin: Cross-site Scripting

Severity
Medium 4.8
Published
9 May 2021
Last changed
17 Jun 2026
Added to UpHeron
21 Oct 2026
Fixed in
1.6.59, 1.16.59
Also known as
WPV-d395f2171bbf
Sources
NVD, WPVulnerability

Description

The UpdraftPlus WordPress Backup Plugin WordPress plugin before 1.6.59 does not sanitise its updraft_service settings, allowing high privilege users to set malicious JavaScript payload in it and leading to a Stored Cross-Site Scripting issue

Affected software

SoftwareAffected versions
UpdraftPlusServers and applications · cpe:a:updraftplus:updraftplus
  • Every version before 1.16.59
UpdraftPlusWordPress plugins · wp-plugin:updraftplus
  • Every version before 1.6.59

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2021-24423
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2021-24423
  • Wordfence https://www.wordfence.com/threat-intel/vulnerabilities/wordpress-plugins/updraftplus/updraftplus-wordpress-backup-plugin-1659-stored-cross-site-scripting