Unauthenticated OS Command Injection in AVideo via `base64Url` Parameter
A critical, zero-click unauthenticated OS command injection vulnerability was disclosed in the open-source video hosting/streaming platform AVideo, tracked as CVE-2026-29058. The flaw affects versions prior to 7.0 (including 6.0) and allows remote attackers to execute arbitrary operating system commands on the server without user interaction or prior privileges, creating a path to full server compromise, data exfiltration (e.g., configuration secrets, internal keys, credentials), and service disruption.
The issue stems from objects/getImage.php, where attacker-controlled input in the base64Url GET parameter is Base64-decoded and incorporated into a double-quoted ffmpeg shell command without proper escaping/neutralization of shell metacharacters and command substitution (CWE-78). The vulnerability was reported by security researcher Arkmarta, and remediation is available by upgrading to AVideo 7.0 or later, which includes the official patch.
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How this story unfolded
3 events from the most recent confirmed update back to the earliest known activity.
Technical details of CVE-2026-29058 are publicly disclosed
Public reporting described the flaw as a critical zero-click issue affecting pre-7.0 AVideo deployments, including version 6.0, and explained that exploitation could enable server compromise, credential theft, service disruption, and live stream hijacking. Mitigation guidance included upgrading, restricting access to the endpoint, deploying WAF rules, or disabling the image retrieval component if unnecessary.
AVideo patches CVE-2026-29058 in version 7.0
The vulnerability was addressed in AVideo version 7.0 and later. The fix reportedly added safer shell argument handling, such as strict escaping, to prevent command injection via the vulnerable endpoint.
Arkmarta discovers unauthenticated command injection in AVideo
Security researcher Arkmarta identified CVE-2026-29058, an unauthenticated OS command injection flaw in AVideo/AVideo-Encoder caused by unsafe handling of the base64Url parameter in objects/getImage.php. The vulnerability allows remote attackers to inject shell commands through an ffmpeg invocation and potentially fully compromise the server.
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Critical Zero-Click Command Injection in AVideo Platform Allows Stream Hijacking
cybersecuritynews.com
Open sourceCVE-2026-29058 - AVideo: Unauthenticated OS Command Injection via base64Url in objects/getImage.php
cvefeed.io
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AVideo Flaws Enable Remote Code Execution via Command Injection and Malicious Plugin Upload
WWBN **AVideo** versions up to and including `26.0` are affected by two high-severity flaws that can lead to **remote code execution**. `CVE-2026-33482` is an OS command injection bug in `sanitizeFFmpegCommand()`, which strips some shell metacharacters but fails to remove bash command substitution using `$()`. Because the resulting `ffmpeg` command is later executed in a double-quoted `sh -c` context by `execAsync()`, an attacker able to craft a valid encrypted payload can run arbitrary commands on the standalone encoder server. A separate issue, `CVE-2026-33507`, allows unauthenticated code execution through the plugin import workflow. The `objects/pluginImport.json.php` endpoint permits admin users to upload and install plugin ZIP archives containing executable PHP, but lacks **CSRF** protection; with `session.cookie_samesite = 'None'` on HTTPS connections, an attacker can trick a logged-in administrator into silently importing a malicious plugin and deploying a PHP webshell. Fixes were introduced in commits `25c8ab90269e3a01fb4cf205b40a373487f022e1` and `d1bc1695edd9ad4468a48cea0df6cd943a2635f3`.
Mar 23, 2026
Multiple Critical AVideo Flaws Enable Takeover, Session Hijacking, and SSRF
WWBN **AVideo** was found to contain multiple high-severity vulnerabilities that can let attackers seize control of deployments, hijack user sessions, and access internal network resources. On uninitialized instances running version **25.0 or earlier**, `install/checkConfiguration.php` could be abused without authentication to complete setup, create an administrator account, and write configuration files, enabling full application takeover under **CVE-2026-33038**. Separate insecure defaults in the official Docker deployment path, tracked as **CVE-2026-33037**, left new installations exposed to immediate administrative compromise because the admin password defaulted to **"password"** and database credentials defaulted to `avideo/avideo`, with no forced password change or effective hardening. AVideo also exposed users and infrastructure through web-facing flaws in session handling and URL fetching. Under **CVE-2026-33043**, `/objects/phpsessionid.json.php` disclosed active PHP session IDs to unauthenticated requests, and permissive CORS behavior could allow cross-origin session theft and account takeover. Two SSRF issues affected the unauthenticated `plugin/LiveLinks/proxy.php` endpoint: **CVE-2026-33039** allowed redirect-based bypass of URL safety checks in version **25.0 and earlier**, while **CVE-2026-33480** showed that `isSSRFSafeURL()` could also be bypassed with IPv4-mapped IPv6 addresses, extending exposure through version **26.0** and enabling access to localhost, RFC1918 networks, and cloud metadata services. WWBN issued fixes in **AVideo 26.0** for most of the disclosed flaws, with an additional patch published for the IPv6-based SSRF bypass.
Jun 8, 2026
AVideo CloneSite Flaws Enable File Deletion and Unauthenticated RCE
WWBN **AVideo** was found to contain multiple high-severity flaws in its `CloneSite` plugin that can be abused for destructive attacks and full server compromise. One issue, tracked as `CVE-2026-33293`, affects versions prior to **26.0** and allows arbitrary file deletion through path traversal in the `deleteDump` parameter of `plugin/CloneSite/cloneServer.json.php`. Because the value was passed directly to `unlink()` without sanitization, an attacker with valid clone credentials could use `../../` sequences to remove arbitrary files such as `configuration.php`, causing denial of service and potentially weakening other protections. A second issue, `CVE-2026-33478`, describes a broader attack chain in AVideo versions up to and including **26.0** that can lead to **unauthenticated remote code execution**. The `clones.json.php` endpoint exposed clone secret keys without authentication, which could then be used to trigger a full database dump via `cloneServer.json.php`; the dump reportedly included admin password hashes stored as **MD5**, enabling attackers to recover credentials and gain administrative access. From there, an OS command injection flaw in `cloneClient.json.php` involving `rsync` command construction could be used to execute arbitrary system commands. The vulnerabilities were mapped to `CWE-22`, `CWE-78`, and `CWE-284`, and fixes were released by WWBN, including a patch referenced in commit `c85d076375fab095a14170df7ddb27058134d38c`.
Apr 22, 2026