Buffer overflow in Html5videoplayer Html5 Video Player
CVE-2019-25689
HTML5 Video Player 1.2.5 contains a local buffer overflow vulnerability that allows attackers to execute arbitrary code by supplying an oversized key code string. Attackers can craft a malicious payload exceeding 997 bytes and paste it into the KEY CODE field in the Help Register dialog to trigger code execution and spawn a calculator process.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (9.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 10th percentile — 9.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Html5videoplayer Html5 Video Player — versions 1.2.5
- Socusoft Html5 Video Player — versions 1.2.5
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/46279 (Exploit, VDB Entry, exploit)
- www.html5videoplayer.net/download.html (Product, product)
- www.vulncheck.com/advisories/html5-video-player-local-buffer-overflow-non-seh (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2019-25689?
- CVE-2019-25689 is a high-severity vulnerability in Html5videoplayer Html5 Video Player, classified under Out-of-bounds Write. CVSS score: 8.4/10. Published 2026-04-12.
- How severe is CVE-2019-25689?
- High severity. CVSS v3 base score is 8.4 out of 10.