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.

Score

CVSS 4.0 8.6 High

Status

Analyzed - disclosure@vulncheck.com

Published

2026-04-12

Last modified

2026-04-15

Weaknesses

CWE-787

Affected products

• Html5 Video Player (Bplugins)
• Html5 Video Player (Socusoft)

References

• http://www.html5videoplayer.net/download.html
• https://www.exploit-db.com/exploits/46279
• https://www.vulncheck.com/advisories/html5-video-player-local-buffer-overflow-non-seh