CVE-2019-25689: HTML5 Video Player 1.2.5 contains a local buffer overflow vulnerability that allows attackers to execute arbit

Routine

HIGH 8.4DOWNGRADE

CVE-2019-25689 is a high-severity flaw (CVSS 8.4) affecting html5 video player. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.4 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 89%)
CISA exploited list	No
Weakness	CWE-787
Published	2026-04-12
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: socusoft

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-12 13:16 UTCPublished CVE record published
2026-06-17 02:32 UTCUpdated Record last modified

socusoft html5 video player DOWNGRADE

Affected: 1.2.5

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.2.5

1. Check installed version

apt-cache policy html5-video-player || rpm -q html5-video-player || html5-video-player --version

2. No fixed release: DOWNGRADE to a release before 1.2.5 (Debian / Ubuntu)

apt-cache madison html5-video-player sudo apt install html5-video-player=<VERSION_BEFORE_1.2.5> sudo apt-mark hold html5-video-player

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list html5-video-player sudo dnf downgrade html5-video-player-<VERSION_BEFORE_1.2.5> sudo dnf versionlock add html5-video-player

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-25689?

html5 video player: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-25689 being exploited?

CVE-2019-25689 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-25689 affect?

CVE-2019-25689 affects html5 video player. Severity is high (CVSS 8.4). 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

How urgent is CVE-2019-25689?

Priority 37/100. High severity; Public exploit reference

References

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