CVE-2019-9736: DOM-based XSS exists in 1024Tools Markdown 1.0 via vectors involving the '<EMBED SRC="data:image/svg+xml' subs

Q: How urgent is CVE-2019-9736?

Priority 41/100. Public exploit reference

This month

MEDIUM 6.1DOWNGRADE

CVE-2019-9736 is a medium-severity flaw (CVSS 6.1) affecting 1024tools. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

DOM-based XSS exists in 1024Tools Markdown 1.0 via vectors involving the '<EMBED SRC="data:image/svg+xml' substring.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.8% (top 43%)
CISA exploited list	No
Weakness	CWE-79
Published	2019-03-13
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: 1024tools

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

Am I affected?

Timeline

2019-03-13 02:29 UTCPublished CVE record published
2026-06-17 02:44 UTCUpdated Record last modified

1024tools 1024tools DOWNGRADE

Affected: 1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0

1. Check installed version

apt-cache policy 1024tools || rpm -q 1024tools || 1024tools --version

2. No fixed release: DOWNGRADE to a release before 1.0 (Debian / Ubuntu)

apt-cache madison 1024tools sudo apt install 1024tools=<VERSION_BEFORE_1.0> sudo apt-mark hold 1024tools

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

dnf --showduplicates list 1024tools sudo dnf downgrade 1024tools-<VERSION_BEFORE_1.0> sudo dnf versionlock add 1024tools

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-2019-9736?

1024tools: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-9736 being exploited?

CVE-2019-9736 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-2019-9736 affect?

CVE-2019-9736 affects 1024tools. Severity is medium (CVSS 6.1). DOM-based XSS exists in 1024Tools Markdown 1.0 via vectors involving the '<EMBED SRC="data:image/svg+xml' substring.

How urgent is CVE-2019-9736?

Priority 41/100. Public exploit reference

References

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