CVE-2025-34433
CVE-2025-34433 is a critical-severity vulnerability with a CVSS 4.0 base score of 9.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-94.
Key facts
- Severity: Critical (CVSS 4.0 base score 9.3)
- EPSS exploit prediction: 1% (70th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-204542
- Weakness: CWE-94
- Published:
- Last modified:
Description
AVideo versions 14.3.1 prior to 20.1 contain an unauthenticated remote code execution vulnerability caused by predictable generation of an installation salt using PHP uniqid(). The installation timestamp is exposed via a public endpoint, and a derived hash identifier is accessible through unauthenticated API responses, allowing attackers to brute-force the remaining entropy. The recovered salt can then be used to encrypt a malicious payload supplied to a notification API endpoint that evaluates attacker-controlled input, resulting in arbitrary code execution as the web server user.
Frequently asked questions
- What is CVE-2025-34433?
- AVideo versions 14.3.1 prior to 20.1 contain an unauthenticated remote code execution vulnerability caused by predictable generation of an installation salt using PHP uniqid(). The installation timestamp is exposed via a public endpoint, and a derived hash identifier is accessible through unauthenticated API responses, allowing attackers to brute-force the remaining entropy. The recovered salt can then be used to encrypt a malicious payload supplied to a notification API endpoint that evaluates attacker-controlled input, resulting in arbitrary code execution as the web server user.
- How severe is CVE-2025-34433?
- CVE-2025-34433 has a CVSS 4.0 base score of 9.3, rated critical severity.
- Is CVE-2025-34433 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2025-34433?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- Does CVE-2025-34433 have an EU (EUVD) identifier?
- Yes. CVE-2025-34433 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-204542.
- When was CVE-2025-34433 published?
- CVE-2025-34433 was published on 2025-12-19 and last updated on 2026-06-17.
References
- https://chocapikk.com/posts/2025/avideo-security-vulnerabilities/
- https://github.com/WWBN/AVideo/commit/4a53ab2
- https://github.com/WWBN/AVideo/commit/a2bdbff
- https://www.vulncheck.com/advisories/avideo-unauthenticated-rce-via-predictable-installation-salt
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