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Description

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.

PUBLISHED Reserved 2026-04-05 | Published 2026-04-12 | Updated 2026-04-15 | Assigner VulnCheck




HIGH: 8.6CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
HIGH: 8.4CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Problem types

Out-of-bounds Write

Product status

1.2.5
affected

Credits

Dino Covotsos - Telspace Systems finder

References

www.exploit-db.com/exploits/46279 (ExploitDB-46279) exploit

www.html5videoplayer.net/download.html (Official Product Homepage) product

www.vulncheck.com/...eo-player-local-buffer-overflow-non-seh (VulnCheck Advisory: HTML5 Video Player 1.2.5 Local Buffer Overflow Non-SEH) third-party-advisory

cve.org (CVE-2019-25689)

nvd.nist.gov (CVE-2019-25689)

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