Cross-site scripting via insufficient output escaping in admin templates

Multiple admin template files fail to properly escape dynamic content before output, allowing cross-site scripting (XSS) attacks. Unescaped variables including nonces, URLs, and user-supplied text are directly echoed in JavaScript handlers, HTML attributes, and content. An attacker could inject malicious scripts through filter hooks, potentially compromising administrator sessions. The fix implements appropriate WordPress escaping functions for each output context.

This vulnerability affects the following application versions:

• UpdraftPlus: WordPress Backup & Migration Plugin 1.13.6
• UpdraftPlus: WordPress Backup & Migration Plugin 1.13.7
• UpdraftPlus: WordPress Backup & Migration Plugin 1.13.8
• UpdraftPlus: WordPress Backup & Migration Plugin 1.13.9
• UpdraftPlus: WordPress Backup & Migration Plugin 1.13.11
• UpdraftPlus: WordPress Backup & Migration Plugin 1.13.12
• UpdraftPlus: WordPress Backup & Migration Plugin 1.13.15
• UpdraftPlus: WordPress Backup & Migration Plugin 1.13.16
• UpdraftPlus: WordPress Backup & Migration Plugin 1.14.2
• UpdraftPlus: WordPress Backup & Migration Plugin 1.14.3
• UpdraftPlus: WordPress Backup & Migration Plugin 1.14.4
• UpdraftPlus: WordPress Backup & Migration Plugin 1.14.5
• UpdraftPlus: WordPress Backup & Migration Plugin 1.14.7
• UpdraftPlus: WordPress Backup & Migration Plugin 1.14.9
• UpdraftPlus: WordPress Backup & Migration Plugin 1.14.10
• UpdraftPlus: WordPress Backup & Migration Plugin 1.14.11
• UpdraftPlus: WordPress Backup & Migration Plugin 1.14.12
• UpdraftPlus: WordPress Backup & Migration Plugin 1.14.13
• UpdraftPlus: WordPress Backup & Migration Plugin 1.15.0
• UpdraftPlus: WordPress Backup & Migration Plugin 1.15.2
• UpdraftPlus: WordPress Backup & Migration Plugin 1.15.3
• UpdraftPlus: WordPress Backup & Migration Plugin 1.15.5
• UpdraftPlus: WordPress Backup & Migration Plugin 1.15.6
• UpdraftPlus: WordPress Backup & Migration Plugin 1.15.7
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.0
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.4
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.5
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.6
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.7
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.8
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.9
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.10
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.11
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.12
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.13
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.14
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.15
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.16
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.17
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.20
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.21
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.22
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.23
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.24
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.25
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.26
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.28
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.29
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.32
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.34
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.35
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.36
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.37
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.40
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.41
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.42
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.43
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.44
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.45
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.46
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.47
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.48
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.49
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.50
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.51
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.53
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.55
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.56
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.59
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.60
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.61
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.62
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.63
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.64
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.65
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.66
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.67
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.68
• UpdraftPlus: WordPress Backup & Migration Plugin 1.16.69
• UpdraftPlus: WordPress Backup & Migration Plugin 1.22.1
• UpdraftPlus: WordPress Backup & Migration Plugin 1.22.3
• UpdraftPlus: WordPress Backup & Migration Plugin 1.22.4
• UpdraftPlus: WordPress Backup & Migration Plugin 1.22.5
• UpdraftPlus: WordPress Backup & Migration Plugin 1.22.6
• UpdraftPlus: WordPress Backup & Migration Plugin 1.22.7
• UpdraftPlus: WordPress Backup & Migration Plugin 1.22.8
• UpdraftPlus: WordPress Backup & Migration Plugin 1.22.9
• UpdraftPlus: WordPress Backup & Migration Plugin 1.22.10
• UpdraftPlus: WordPress Backup & Migration Plugin 1.22.11
• UpdraftPlus: WordPress Backup & Migration Plugin 1.22.12
• UpdraftPlus: WordPress Backup & Migration Plugin 1.22.14
• UpdraftPlus: WordPress Backup & Migration Plugin 1.22.15
• UpdraftPlus: WordPress Backup & Migration Plugin 1.22.16
• UpdraftPlus: WordPress Backup & Migration Plugin 1.22.17
• UpdraftPlus: WordPress Backup & Migration Plugin 1.22.18
• UpdraftPlus: WordPress Backup & Migration Plugin 1.22.19
• UpdraftPlus: WordPress Backup & Migration Plugin 1.22.20
• UpdraftPlus: WordPress Backup & Migration Plugin 1.22.21
• UpdraftPlus: WordPress Backup & Migration Plugin 1.22.22
• UpdraftPlus: WordPress Backup & Migration Plugin 1.22.23
• UpdraftPlus: WordPress Backup & Migration Plugin 1.22.24
• UpdraftPlus: WordPress Backup & Migration Plugin 1.23.1
• UpdraftPlus: WordPress Backup & Migration Plugin 1.23.2
• UpdraftPlus: WordPress Backup & Migration Plugin 1.23.3
• UpdraftPlus: WordPress Backup & Migration Plugin 1.23.4
• UpdraftPlus: WordPress Backup & Migration Plugin 1.23.5
• UpdraftPlus: WordPress Backup & Migration Plugin 1.23.6
• UpdraftPlus: WordPress Backup & Migration Plugin 1.23.7
• UpdraftPlus: WordPress Backup & Migration Plugin 1.23.8
• UpdraftPlus: WordPress Backup & Migration Plugin 1.23.9
• UpdraftPlus: WordPress Backup & Migration Plugin 1.23.10
• UpdraftPlus: WordPress Backup & Migration Plugin 1.23.11
• UpdraftPlus: WordPress Backup & Migration Plugin 1.23.12
• UpdraftPlus: WordPress Backup & Migration Plugin 1.23.13
• UpdraftPlus: WordPress Backup & Migration Plugin 1.23.15
• UpdraftPlus: WordPress Backup & Migration Plugin 1.23.16
• UpdraftPlus: WordPress Backup & Migration Plugin 1.24.1
• UpdraftPlus: WordPress Backup & Migration Plugin 1.24.2
• UpdraftPlus: WordPress Backup & Migration Plugin 1.24.3
• UpdraftPlus: WordPress Backup & Migration Plugin 1.24.4
• UpdraftPlus: WordPress Backup & Migration Plugin 1.24.5
• UpdraftPlus: WordPress Backup & Migration Plugin 1.24.6
• UpdraftPlus: WordPress Backup & Migration Plugin 1.24.7
• UpdraftPlus: WordPress Backup & Migration Plugin 1.24.8
• UpdraftPlus: WordPress Backup & Migration Plugin 1.24.9
• UpdraftPlus: WordPress Backup & Migration Plugin 1.24.10
• UpdraftPlus: WordPress Backup & Migration Plugin 1.24.11