CVE-2026-80138: Command Injection (CVSS 9.8)

Description

ClipBucket V5's web installer fails to properly validate or escape the php_cli_filepath parameter before passing it to shell execution. Unauthenticated attackers can submit a crafted POST request to the installer with a malicious php_cli_filepath value to execute arbitrary commands as the web server user.

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CVSS v3.1 Score

9.8

CRITICAL

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

EPSS — Exploit Prediction

0.0080

Probability of exploitation

0.55%

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/MacWarrior/clipbucket-v5 https://github.com/MacWarrior/clipbucket-v5/blob/5.5.3-%23153/upload/cb_install/functions_install.php https://github.com/MacWarrior/clipbucket-v5/blob/5.5.3-%23153/upload/includes/classes/system.class.php https://github.com/MacWarrior/clipbucket-v5/commit/36e7c6cfd81f62a091d2aeef96a8fc2fc2d85dc4 https://www.vulncheck.com/advisories/clipbucket-v5-5.5.1-through-5.5.3-153-os-command-injection-via-installer-php-cli-filepath-parameter

Frequently Asked Questions

What is CVE-2026-80138? +

ClipBucket V5's web installer fails to properly validate or escape the php_cli_filepath parameter before passing it to shell execution. Unauthenticated attackers can submit a crafted POST request to the installer with a malicious php_cli_filepath value to execute arbitrary commands as the web server user. It has a CVSS v3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2026-80138? +

CVE-2026-80138 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately. The EPSS score is 0.0080, placing it in the 1th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-80138? +

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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