Fedora 43: Critical XSS Vulnerability Advisory for Nextcloud 31.0.9
fedora
September 30, 2025
31.0.9 release RHBZ#2388493 RHBZ#2389830 RHBZ#2389831 RHBZ#2389842 RHBZ#2389843 RHBZ#2389814 RHBZ#2389815
Summary
NextCloud gives you universal access to your files through a web interface or
WebDAV. It also provides a platform to easily view & sync your contacts,
calendars and bookmarks across all your devices and enables basic editing right
on the web. NextCloud is extendable via a simple but powerful API for
applications and plugins.
Update Information:
31.0.9 release RHBZ#2388493 RHBZ#2389830 RHBZ#2389831 RHBZ#2389842 RHBZ#2389843 RHBZ#2389814 RHBZ#2389815
Topics Covered
Change Log
* Sat Sep 20 2025 Andrew Bauer
References
[ 1 ] Bug #2388493 - nextcloud-31.0.9 is available
https://bugzilla.redhat.com/show_bug.cgi?id=2388493
[ 2 ] Bug #2389814 - CVE-2025-54881 nextcloud: Mermaid cross site scripting [epel-10]
https://bugzilla.redhat.com/show_bug.cgi?id=2389814
[ 3 ] Bug #2389815 - CVE-2025-54880 nextcloud: Mermaid cross site scripting [epel-10]
https://bugzilla.redhat.com/show_bug.cgi?id=2389815
[ 4 ] Bug #2389830 - CVE-2025-54881 nextcloud: Mermaid cross site scripting [fedora-41]
https://bugzilla.redhat.com/show_bug.cgi?id=2389830
[ 5 ] Bug #2389831 - CVE-2025-54880 nextcloud: Mermaid cross site scripting [fedora-41]
https://bugzilla.redhat.com/show_bug.cgi?id=2389831
[ 6 ] Bug #2389842 - CVE-2025-54881 nextcloud: Mermaid cross site scripting [fedora-42]
https://bugzilla.redhat.com/show_bug.cgi?id=2389842
[ 7 ] Bug #2389843 - CVE-2025-54880 nextcloud: Mermaid cross site scripting [fedora-42]
https://bugzilla.redhat.com...
Update Instructions
This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2025-8af4de0f83' at the command line. For more information, refer to the dnf documentation available at http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label
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Severity
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Name: nextcloud
Product: Fedora 43
Version: 31.0.9
Release: 1.fc43
URL: http://nextcloud.com
Summary: Private file sync and share server
Topics Covered
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