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Nextcloud · disclosed report #190870

Stored XSS on new Calling plugin (spreed)

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Similar findings, side by side
ReportAccessWhose objectBoundary crossed
[Grab Android/iOS] Insecure deeplink leads to sensitive information disclosureNo accountThe attacker's ownA crafted deeplink caused the app's privileged webview to disclose its user's data to attacker-controlled content.
XSS vulnerable parameter in a location hashNo accountNo object involvedA crafted link could cause script execution in a victim’s site context.
[accounts.reddit.com] Redirect parameter allows for XSSNo accountNo object involvedA crafted redirect destination caused script execution in the account site’s browser context.
yelp.com XSS ATO (via login keylogger, link Google account)No accountAnother user'sA crafted link causes script to run in a victim’s Yelp session and link an attacker-controlled identity to the victim’s account.
XSS at jamfpro.shopifycloud.comNo accountNo object involvedA crafted link caused attacker-controlled script to execute in the application origin.
Stored XSS in developer.uber.comA user accountNo object involvedA contributor’s stored suggestion executes in an administrator’s dashboard context.
[www.zomato.com] Blind XSS on one of the Admin DashboardA user accountThe attacker's ownCustomer-submitted order content executed in an administrator's browser.
Account Takeover in Periscope TVNo accountAnother user'sOAuth authorization data for a victim was sent to an attacker-controlled destination.
XSS and cache poisoning via upload.twitter.com on ton.twitter.comA user accountAnother tenant'sA signed upload made an attacker-controlled file viewable by another user in the target origin.
XSS at https://exchangemarketplace.com/blogsearchNo accountNo object involvedUntrusted search input was interpreted as script in the site's page.
xss on https://www.rockstargames.com/GTAOnline/jp/screens/No accountNo object involvedUntrusted path content was treated as executable script in a visitor's browser.
XSS in gist integrationA user accountThe attacker's ownA crafted gist name crosses into executable markup in the integration's viewer.
Program
Nextcloud
Status
Valid
Severity
High
Bounty
None stated
Weakness as filed
Cross-site Scripting (XSS) - Generic
Disclosed
2016
Upvotes
4

Data as of 2026-11-15. CVE List through 2026-11-15 · EPSS of 2026-11-14 · CISA KEV checked 2026-11-15. Sources: the CVE List, CISA KEV, EPSS, NVD, nuclei templates and public bug bounty data.