CVE-2024-21910: TinyMCE versions before 5.10.0 are affected by a cross-site scripting vulnerability

Q: How do I fix CVE-2024-21910?

tinymce: upgrade to 5.10.0. Exact commands for each OS are on this page.

Q: Is CVE-2024-21910 being exploited?

CVE-2024-21910 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2024-21910 affect?

CVE-2024-21910 affects tinymce. Severity is medium (CVSS 6.1). TinyMCE versions before 5.10.0 are affected by a cross-site scripting vulnerability. A remote and unauthenticated attacker could introduce crafted image or link URLs that would result in the execution of arbitrary JavaScript in an editing u

Q: How urgent is CVE-2024-21910?

Priority 42/100. Public exploit reference

This month

MEDIUM 6.1UPGRADE

CVE-2024-21910 is a medium-severity flaw (CVSS 6.1) affecting tinymce. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

TinyMCE versions before 5.10.0 are affected by a cross-site scripting vulnerability. A remote and unauthenticated attacker could introduce crafted image or link URLs that would result in the execution of arbitrary JavaScript in an editing user's browser.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.0% (top 39%)
CISA exploited list	No
Weakness	CWE-79
Published	2024-01-03
Last modified	2026-07-14

Publisher (CNA): VulnCheck · Vendor: tiny

Last updated 2026-07-14 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-01-03 16:15 UTCPublished CVE record published
2026-07-14 23:17 UTCUpdated Record last modified

tiny tinymce UPGRADE

Affected: < 5.10.0

Fixed in: 5.10.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy tinymce || rpm -q tinymce || tinymce --version

2. UPGRADE to 5.10.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade tinymce

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade tinymce

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2024-21910?

tinymce: upgrade to 5.10.0. Exact commands for each OS are on this page.

Is CVE-2024-21910 being exploited?

CVE-2024-21910 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-2024-21910 affect?

CVE-2024-21910 affects tinymce. Severity is medium (CVSS 6.1). TinyMCE versions before 5.10.0 are affected by a cross-site scripting vulnerability. A remote and unauthenticated attacker could introduce crafted image or link URLs that would result in the execution of arbitrary JavaScript in an editing u

How urgent is CVE-2024-21910?

Priority 42/100. Public exploit reference

Related CVEs

CVE-2026-47759 HIGH 8.7 UPGRADE TinyMCE is an open source rich text editor
CVE-2026-47762 HIGH 8.7 UPGRADE TinyMCE is an open source rich text editor
CVE-2026-47761 HIGH 8.7 UPGRADE TinyMCE is an open source rich text editor
CVE-2026-47760 HIGH 8.7 UPGRADE TinyMCE is an open source rich text editor
CVE-2024-21911 MEDIUM 6.1 UPGRADE TinyMCE versions before 5.6.0 are affected by a stored cross-site scripting vulnerability

References

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