The "Add Link to Facebook" plugin through 2.3 for WordPress has XSS via the al2fbfacebookid parameter to wp-admin/profile.php.

The Facebook Facts (aka com.wFacebookFacts) application 0.1 for Android does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.

DISPUTED Cross-site scripting (XSS) vulnerability in the Facebook app 14.0 and the Facebook Messenger app 10.0 for iOS allows remote attackers to inject arbitrary web script or HTML via a crafted filename extension that is improperly handled during MIME sniffing of chat traffic. NOTE: the vendor disputes the significance of this report, because the user must accept an interstitial warning before the HTML file content is rendered, and because the HTML content's origin is a sandbox domain.

Multiple stack-based buffer overflows in Aurigma Image Uploader ActiveX control (ImageUploader4.ocx) 4.6.17.0, 4.5.70.0, and 4.5.126.0, and ImageUploader5 5.0.10.0, as used by Facebook PhotoUploader 4.5.57.0, allow remote attackers to execute arbitrary code via long (1) ExtractExif and (2) ExtractIptc properties.