CVE-2026-63304: Command Injection (CVSS 8.1)

Description

AVideo through 29.0 contains an OS command injection vulnerability in plugin/API/standAlone/functions.php where the listFFmpegProcesses() function interpolates unsanitized keyword parameters inside single quotes without escaping. Attackers who can craft a valid encrypted codeToExec payload can break out of the single-quoted grep context and execute arbitrary OS commands as the web-server user.

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CVSS v3.1 Score

8.1

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploit Prediction

0.0136

Probability of exploitation

0.69%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-78 OS Command Injection

References

Other References

https://github.com/WWBN/AVideo/security/advisories/GHSA-j44m-77cc-p3cc https://www.vulncheck.com/advisories/avideo-through-os-command-injection-via-listffmpegprocesses https://github.com/WWBN/AVideo/security/advisories/GHSA-j44m-77cc-p3cc

Frequently Asked Questions

What is CVE-2026-63304? +

AVideo through 29.0 contains an OS command injection vulnerability in plugin/API/standAlone/functions.php where the listFFmpegProcesses() function interpolates unsanitized keyword parameters inside single quotes without escaping. Attackers who can craft a valid encrypted codeToExec payload can break out of the single-quoted grep context and execute arbitrary OS commands as the web-server user. It has a CVSS v3.1 base score of 8.1 (HIGH).

How severe is CVE-2026-63304? +

CVE-2026-63304 has a CVSS v3.1 score of 8.1 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0136, placing it in the 1th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-63304? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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