CVE-2024-21908

Name: CVE-2024-21908
Creator: NVD / NIST
Published: 2024-01-03T16:15:08.913+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 1.07%

Last modified Jun 17, 2026

CVE-2024-21908 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. TinyMCE versions before 5.9.0 are affected by a stored cross-site scripting vulnerability. An unauthenticated and remote attacker could insert crafted HTML into the editor resulting in arbitrary JavaScript execution in another user's browser.. EPSS estimates a 1.07% chance of exploitation in the next 30 days.

Description

TinyMCE versions before 5.9.0 are affected by a stored cross-site scripting vulnerability. An unauthenticated and remote attacker could insert crafted HTML into the editor resulting in arbitrary JavaScript execution in another user's browser.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

1.07%

60.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Tiny	Tinymce	< 5.9.0

References

https://github.com/advisories/GHSA-5h9g-x5rv-25wgExploit, Third Party Advisory
https://github.com/tinymce/tinymce/security/advisories/GHSA-5h9g-x5rv-25wgExploit, Third Party Advisory
https://vulncheck.com/advisories/vc-advisory-GHSA-5h9g-x5rv-25wgThird Party Advisory
https://www.tiny.cloud/docs/release-notes/release-notes59/#securityfixesRelease Notes
https://github.com/advisories/GHSA-5h9g-x5rv-25wgExploit, Third Party Advisory
https://github.com/tinymce/tinymce/security/advisories/GHSA-5h9g-x5rv-25wgExploit, Third Party Advisory
https://vulncheck.com/advisories/vc-advisory-GHSA-5h9g-x5rv-25wgThird Party Advisory
https://www.tiny.cloud/docs/release-notes/release-notes59/#securityfixesRelease Notes

Timeline

Published: Jan 3, 2024
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2024-21908?

How severe is CVE-2024-21908?

CVE-2024-21908 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 1.07% probability of exploitation in the next 30 days.

How do I fix CVE-2024-21908?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2024-21908?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST