Nextcloud · disclosed reports
Server-Side Request Forgery
19 disclosed reports · $1,200 paid
Out of date: the sync last ran 4 hours ago. Newer CVEs and scores may be missing from the map.
Every dot is a report; the named ones are the most upvoted. Bright dots were paid a bounty. Reports open on HackerOne.
Open Nextcloud on HackerOne- reports
- 19
- paid a bounty
- 6
Every one of the 19 is a mark on the map. Named now: 1 to 19, most upvoted first.
- SSRF via User-Controlled Push proxyServer in Notifications Push Registration
- DNS pin middleware can be tricked into DNS rebinding allowing SSRF
- Blind SSRF in Mail App
- SSRF via filter bypass due to lax checking on IPs
- SSRF via potential filter bypass with too lax local domain checking
- [nextcloud/mail] Blind SSRF to Internal Network via "List-Unsubscribe" SMTP Header when allow_local_remote_servers is allowed
- SSRF protection bypass
- SSRF on Nextcloud Whiteboard Application via Recordings to Unauthorised Access to Whiteboards
- Unauthenticated SSRF in 3rd party module "cerdic/csstidy"
- Unauthenticated blind SSRF in Circles signature verification bypasses Nextcloud local-address protections
- Responsive Server-side Request Forgery (SSRF)
- Blind SSRF as normal user from mailapp
- Mail app - blind SSRF via imapHost parameter
- Mail app - blind SSRF via smtpHost parameter
- Mail app - Blind SSRF via Sierve server fonctionnality and sieveHost parameter
- Server-Side request forgery in New-Subscription feature of the calendar app
- SSRF on local storage of iOS mobile
- SSRF at apps.nextcloud.com/developer/apps/releases/new
- Possible SSRF in email server settings(SMTP mode)
paid a bounty
Zoom in on the map and the dots under the middle of it are named where they are.
Data as of 2026-11-14. CVE List through 2026-11-14 · EPSS of 2026-11-13 · CISA KEV checked 2026-11-14. Sources: the CVE List, CISA KEV, EPSS, NVD, nuclei templates and public bug bounty data.