Grist vulnerabilities

Grist prior to version 1.7.15 contained two cross-site scripting vulnerabilities where an attacker-controlled value reached a link's href without scheme validation, allowing JavaScript execution in the victim's context on a single click. On the account-selection page, the next parameter was used as the link target, and in document tours, the GristDocTour table's Link_URL column became a clickable button, enabling an editor to store a malicious URL.

In Grist prior to version 1.7.15, the GET /forms endpoint read table and column metadata without applying the document's access rules and did not check that the requested section was actually a form. A user with only partial read access, including public access on a publicly viewable document, could request the metadata of any widget and reveal table and column structure that access rules would otherwise hide, even in documents that contain no forms.

Grist is spreadsheet software using Python as its formula language. Prior to version 1.7.15, several server-rendered pages embedded user-controlled values without proper escaping, leading to cross-site scripting. On the main page, a document's name or description set by an editor is rendered for other users. On the OAuth2 end-of-flow page, the openerOrigin parameter is reflected back.