high CVSS 7.2

CVE-2025-62429·PHP vulnerability

ClipBucket v5 is an open source video sharing platform. Prior to version 5.5.2 #147, ClipBucket v5 is vulnerable to arbitrary PHP code execution. In /upload/admin_area/actions/update_launch.php, the "type" parameter from a POST request is embedded into PHP tags and executed. Proper sanitization is not performed, and by injecting malicious code an attacker can execute arbitrary PHP code. This allows an attacker to achieve RCE. This issue has been resolved in version 5.5.2 #147.

Severity
high
Software
PHP
Fixed in
5.5.2-147
Published
2025-10-20

Affected versions

From: 5.3

Until: 5.5.2-147

Fixed in: 5.5.2-147

How to fix this CVE

ClipBucket v5 users must upgrade to version 5.5.2-147 or later to patch a critical remote code execution vulnerability in the admin update handler. The vulnerability allows authenticated administrators with high privileges to inject arbitrary PHP code through an unsanitized POST parameter, leading to full server compromise. Immediately apply the security patch and verify the update completed successfully before resuming normal operations.

sudo dnf check-update php && sudo dnf update php

Defensia detects this vulnerability

What an exploitation attempt looks like

Sample log line indicative of exploitation attempts:

POST /upload/admin_area/actions/update_launch.php HTTP/1.1.*type=.*<?php.*

WAF mitigation (if patching is not yet possible)

Add this rule to your WAF to block exploitation attempts while you schedule the patch. 

Block or closely inspect all POST requests to `/upload/admin_area/actions/update_launch.php` that contain PHP code tags (`<?php`, `<?=`, `?>`) in the 'type' parameter. Implement strict input validation to reject any 'type' values that are not whitelisted alphanumeric strings.

How to check if you are affected

  1. Step 1: Run `php -v` to check the current PHP version installed on your system and verify it is not running a vulnerable ClipBucket version range (5.3 to 5.5.1)
  2. Step 2: If ClipBucket is installed, navigate to the installation directory and check the version in `/admin_area/actions/update_launch.php` or the main config file to confirm you are running version 5.5.2-147 or later
  3. Step 3: Search web server access and error logs for POST requests to `/upload/admin_area/actions/update_launch.php` with suspicious 'type' parameters containing PHP tags or shell commands using: `grep -i 'update_launch.php' /var/log/apache2/access.log | grep POST`
  4. Step 4: Verify the patch by reviewing the git commit hash in your ClipBucket installation against e81bac602c871bb1ad971884003a3a496a2ab50b to confirm the sanitization fix is present

Indicators of compromise

  • /upload/admin_area/actions/update_launch.php
  • POST parameter: type with PHP tags
  • e81bac602c871bb1ad971884003a3a496a2ab50b

FAQ

What is CVE-2025-62429?

CVE-2025-62429 is a remote code execution vulnerability in ClipBucket v5 where the admin update handler fails to sanitize user input in the 'type' POST parameter, allowing attackers with admin credentials to inject and execute malicious PHP code on the server.

Is CVE-2025-62429 being actively exploited?

No, this vulnerability is not currently listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, and there are no publicly available proof-of-concept exploits. However, the high CVSS score (7.2) and the requirement for admin-level access mean internal threats or compromised admin accounts pose significant risk.

What versions of PHP are affected by CVE-2025-62429?

ClipBucket v5 versions 5.3 through 5.5.2-146 are vulnerable. The vulnerability is patched in ClipBucket v5.5.2-147 and later releases.

How do I check if my server is vulnerable to CVE-2025-62429?

If ClipBucket is installed, run `grep -r 'update_launch.php' /path/to/clipbucket/` and verify your installed version with `cat /path/to/clipbucket/version.txt` or check the release tag. If the version is earlier than 5.5.2-147, your installation is vulnerable.

Does Defensia detect CVE-2025-62429?

Yes — Defensia's CVE advisory scanner compares installed package versions against the NVD database. If PHP or ClipBucket is installed on a monitored server, CVE-2025-62429 will appear in your dashboard with remediation steps.

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References

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