Hackers Backdoor Nextcloud Servers Through Critical Flaw in Collabora’s Built-in CODE App

Attackers exploited a flaw in an optional Nextcloud app, Collabora Online - Built-in CODE Server, to plant web shells on Nextcloud servers. Three administrators reported the issue on GitHub, with the first logged attack on September 10. A web shell is a small file that executes any command an...

CVE-2026-110447

Collabora Online Built-in CODE Server before 26.4.303 richdocumentscode, a Nextcloud app, allows remote code execution, as exploited in the wild in September and October 2026, a different vulnerability than CVE-2025-66208. This is an OS command injection in proxy.php when the CODE server isn't...

EUVD-2026-100780

Collabora Online Built-in CODE Server before 26.4.303 richdocumentscode, a Nextcloud app, allows remote code execution, as exploited in the wild in September and October 2026, a different vulnerability than CVE-2025-66208. This is an OS command injection in proxy.php when the CODE server isn't...

CVE-2026-110447

Collabora Online Built-in CODE Server before 26.4.303 richdocumentscode, a Nextcloud app, allows remote code execution, as exploited in the wild in September and October 2026, a different vulnerability than CVE-2025-66208. This is an OS command injection in proxy.php when the CODE server isn't...

CVE-2026-110447

Collabora Online Built-in CODE Server before 26.4.303 richdocumentscode, a Nextcloud app, allows remote code execution, as exploited in the wild in September and October 2026, a different vulnerability than CVE-2025-66208. This is an OS command injection in proxy.php when the CODE server isn't...

CVE-2026-110447

The Collabora Online Built-in CODE Server (Nextcloud app richdocumentscode ) is vulnerable to remote code execution (RCE) via an OS command injection in the proxy.php script. The flaw occurs specifically when the CODE server is not running, such as immediately after a restart, crash, or upgrade. ...

CVE-2026-110447

Collabora Online Built-in CODE Server before 26.4.303 richdocumentscode, a Nextcloud app, allows remote code execution, as exploited in the wild in September and October 2026, a different vulnerability than CVE-2025-66208. This is an OS command injection in proxy.php when the CODE server isn't...

PT-2026-113607

Name of the Vulnerable Software and Affected Versions Collabora Online Built-in CODE Server richdocumentscode versions prior to 26.4.303 Description An OS command injection issue exists in the proxy.php endpoint of the richdocumentscode app. The flaw occurs when the built-in CODE server is not...

VulnCheck KEV: CVE-2026-110447

Collabora Online Built-in CODE Server before 26.4.303 richdocumentscode, a Nextcloud app, allows remote code execution, as exploited in the wild in September and October 2026, a different vulnerability than CVE-2025-66208. This is an OS command injection in proxy.php when the CODE server isn't...

CVE-2026-110447: Improper Neutralization of Special Elements used in an OS Command

Collabora Online Built-in CODE Server before 26.4.303 richdocumentscode, a Nextcloud app, allows remote code execution, as exploited in the wild in September and October 2026, a different vulnerability than CVE-2025-66208. This is an OS command injection in proxy.php when the CODE server isn't...

PT-2026-93946

A Server-Side Request Forgery vulnerability exists in sat proxy.php in Zenith Satellite Tracker 1.0. The script accepts an attacker-controlled address URL parameter and passes it to curl setoptCURLOPT URL without host or scheme validation. An unauthenticated remote attacker can leverage this to...

Cross RSS 1.7 - Local File Inclusion Detection

Absolute path traversal vulnerability in Cross-RSS wp-cross-rss plugin 1.7 for WordPress allows remote attackers to read arbitrary files via a full pathname in the rss parameter to proxy.php. !/usr/bin/env python3 -- coding: utf-8 -- """Absolute path traversal vulnerability in Cross-RSS...

Last.fm Rotation 1.0 - Path Traversal Detection

Directory traversal vulnerability in lastfm-proxy.php in the Last.fm Rotation lastfm-rotation plugin 1.0 for WordPress allows remote attackers to read arbitrary files via a .. dot dot in the snode parameter. !/usr/bin/env python3 -- coding: utf-8 -- """Directory traversal vulnerability in...

CVE-2026-33480

WWBN AVideo is an open source video platform. In versions up to and including 26.0, the "isSSRFSafeURL" function in AVideo can be bypassed using IPv4-mapped IPv6 addresses "::ffff:x.x.x.x". The unauthenticated "plugin/LiveLinks/proxy.php" endpoint uses this function to validate URLs before fetchi...

CVE-2026-33480: Server-Side Request Forgery (SSRF)

WWBN AVideo is an open source video platform. In versions up to and including 26.0, the isSSRFSafeURL function in AVideo can be bypassed using IPv4-mapped IPv6 addresses ::ffff:x.x.x.x. The unauthenticated plugin/LiveLinks/proxy.php endpoint uses this function to validate URLs before fetching the...

CVE-2026-33039: Server-Side Request Forgery (SSRF)

WWBN AVideo is an open source video platform. In versions 25.0 and below, the plugin/LiveLinks/proxy.php endpoint validates user-supplied URLs against internal/private networks using isSSRFSafeURL, but only checks the initial URL. When the initial URL responds with an HTTP redirect Location heade...

CVE-2023-49782

Collabora Online is a collaborative online office suite based on LibreOffice technology. Users of Nextcloud with Collabora Online - Built-in CODE Server app can be vulnerable to attack via proxy.php. The bug was fixed in Collabora Online - Built-in CODE Server richdocumentscode release 23.5.601...

CVE-2025-66208

CVE-2025-66208 affects Collabora Online – Built-in CODE Server (richdocumentscode proxy). The vulnerability is a configuration-dependent OS command injection (RCE) in the richdocumentscode proxy present in versions prior to 25.04.702, exploitable by attackers via proxy.php and an intermediate rev...

CVE-2025-66208: Improper Neutralization of Special Elements used in an OS Command

Collabora Online - Built-in CODE Server richdocumentscode provides a built-in server with all of the document editing features of Collabora Online. In versions prior to 25.04.702, Collabora Online has a Configuration-Dependent RCE OS Command Injection in richdocumentscode proxy. Users of Nextclou...

CVE-2025-13588 lKinderBueno Streamity Xtream IPTV Player proxy.php server-side request forgery

A vulnerability was found in lKinderBueno Streamity Xtream IPTV Player up to 2.8. The impacted element is an unknown function of the file public/proxy.php. Performing manipulation results in server-side request forgery. The attack can be initiated remotely. The exploit has been made public and...