CVE-2024-21908

Cross-site scripting vulnerability in TinyMCE

publishedCWE-79

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.

Technical severity6.1 mediumCVSS 3.1 · ADP: CISA-ADP

Published2024-01-03Source updated 2026-11-08

Collected2026-11-083 attributed sources

Fixes and workarounds

Fix

tinymce (npm): OSV reports a fixed version 5.9.0. Check the advisory for supported release branches.

Source: OSV GHSA-5h9g-x5rv-25wg

Fix

TinyMCE (NuGet): OSV reports a fixed version 5.9.0. Check the advisory for supported release branches.

Source: OSV GHSA-5h9g-x5rv-25wg

Fix

tinymce/tinymce (Packagist): OSV reports a fixed version 5.9.0. Check the advisory for supported release branches.

Source: OSV GHSA-5h9g-x5rv-25wg

Affected products and versions

Affected products, source version ranges and reporting authorities
Product	Versions	Authority
`TinyMCE` nuget	≥ 0; < 5.9.0 (affected, semver 2.0.0) Other versions: unaffected	CNA: VulnCheck
tinymce `tinymce` npm	≥ 0; < 5.9.0 (affected, semver); OSV events: introduced 0; fixed 5.9.0 Source events (semver) `[ { "introduced": "0" }, { "fixed": "5.9.0" } ]` Other versions: unaffected	OSV GHSA-5h9g-x5rv-25wg
TinyMCE `TinyMCE` NuGet	3.4.3.2 (affected, NuGet) 3.4.4 (affected, NuGet) 3.4.5 (affected, NuGet) 3.4.7 (affected, NuGet) 3.5.0 (affected, NuGet) 3.5.0.1 (affected, NuGet) 3.5.1 (affected, NuGet) 3.5.1.1 (affected, NuGet) 3.5.2 (affected, NuGet) 3.5.3 (affected, NuGet) 3.5.4 (affected, NuGet) 3.5.4.1 (affected, NuGet) 3.5.5 (affected, NuGet) 3.5.6 (affected, NuGet) 3.5.7 (affected, NuGet) 3.5.8 (affected, NuGet) 4.0.0 (affected, NuGet) 4.0.1 (affected, NuGet) 4.0.10 (affected, NuGet) 4.0.11 (affected, NuGet) 4.0.13 (affected, NuGet) 4.0.14 (affected, NuGet) 4.0.15 (affected, NuGet) 4.0.16 (affected, NuGet) 4.0.17 (affected, NuGet) 4.0.18 (affected, NuGet) 4.0.19 (affected, NuGet) 4.0.2 (affected, NuGet) 4.0.20 (affected, NuGet) 4.0.21 (affected, NuGet) 4.0.22 (affected, NuGet) 4.0.23 (affected, NuGet) 4.0.24 (affected, NuGet) 4.0.25 (affected, NuGet) 4.0.26 (affected, NuGet) 4.0.27 (affected, NuGet) 4.0.28 (affected, NuGet) 4.0.4 (affected, NuGet) 4.0.5 (affected, NuGet) 4.0.6 (affected, NuGet) 4.0.8 (affected, NuGet) 4.0.9 (affected, NuGet) 4.1.0 (affected, NuGet) 4.1.1 (affected, NuGet) 4.1.10 (affected, NuGet) 4.1.2 (affected, NuGet) 4.1.3 (affected, NuGet) 4.1.4 (affected, NuGet) 4.1.5 (affected, NuGet) 4.1.6 (affected, NuGet) 4.1.7 (affected, NuGet) 4.1.8 (affected, NuGet) 4.1.9 (affected, NuGet) 4.2.0 (affected, NuGet) 4.2.1 (affected, NuGet) 4.2.2 (affected, NuGet) 4.2.3 (affected, NuGet) 4.2.4 (affected, NuGet) 4.2.5 (affected, NuGet) 4.2.6 (affected, NuGet) 4.2.7 (affected, NuGet) 4.2.8 (affected, NuGet) 4.3.0 (affected, NuGet) 4.3.1 (affected, NuGet) 4.3.10 (affected, NuGet) 4.3.11 (affected, NuGet) 4.3.12 (affected, NuGet) 4.3.13 (affected, NuGet) 4.3.2 (affected, NuGet) 4.3.3 (affected, NuGet) 4.3.4 (affected, NuGet) 4.3.6 (affected, NuGet) 4.3.7 (affected, NuGet) 4.3.8 (affected, NuGet) 4.3.9 (affected, NuGet) 4.4.0 (affected, NuGet) 4.4.1 (affected, NuGet) 4.4.2 (affected, NuGet) 4.4.3 (affected, NuGet) 4.5.0 (affected, NuGet) 4.5.1 (affected, NuGet) 4.5.2 (affected, NuGet) 4.5.3 (affected, NuGet) 4.5.4 (affected, NuGet) 4.5.5 (affected, NuGet) 4.5.6 (affected, NuGet) 4.5.7 (affected, NuGet) 4.5.8 (affected, NuGet) 4.6.0 (affected, NuGet) 4.6.1 (affected, NuGet) 4.6.2 (affected, NuGet) 4.6.3 (affected, NuGet) 4.6.4 (affected, NuGet) 4.6.5 (affected, NuGet) 4.6.6 (affected, NuGet) 4.6.7 (affected, NuGet) 4.7.0 (affected, NuGet) 4.7.10 (affected, NuGet) 4.7.11 (affected, NuGet) 4.7.12 (affected, NuGet) 4.7.13 (affected, NuGet) 4.7.3 (affected, NuGet) 4.7.4 (affected, NuGet) 4.7.5 (affected, NuGet) 4.7.6 (affected, NuGet) 4.7.7 (affected, NuGet) 4.7.8 (affected, NuGet) 4.7.9 (affected, NuGet) 4.8.0 (affected, NuGet) 4.8.1 (affected, NuGet) 4.8.2 (affected, NuGet) 4.8.3 (affected, NuGet) 4.8.4 (affected, NuGet) 4.8.5 (affected, NuGet) 4.9.0 (affected, NuGet) 4.9.1 (affected, NuGet) 4.9.10 (affected, NuGet) 4.9.11 (affected, NuGet) 4.9.2 (affected, NuGet) 4.9.3 (affected, NuGet) 4.9.4 (affected, NuGet) 4.9.5 (affected, NuGet) 4.9.6 (affected, NuGet) 4.9.7 (affected, NuGet) 4.9.8 (affected, NuGet) 4.9.9 (affected, NuGet) 5.0.0 (affected, NuGet) 5.0.1 (affected, NuGet) 5.0.10 (affected, NuGet) 5.0.11 (affected, NuGet) 5.0.12 (affected, NuGet) 5.0.13 (affected, NuGet) 5.0.14 (affected, NuGet) 5.0.15 (affected, NuGet) 5.0.16 (affected, NuGet) 5.0.2 (affected, NuGet) 5.0.3 (affected, NuGet) 5.0.4 (affected, NuGet) 5.0.5 (affected, NuGet) 5.0.6 (affected, NuGet) 5.0.7 (affected, NuGet) 5.0.8 (affected, NuGet) 5.0.9 (affected, NuGet) 5.1.0 (affected, NuGet) 5.1.1 (affected, NuGet) 5.1.2 (affected, NuGet) 5.1.3 (affected, NuGet) 5.1.4 (affected, NuGet) 5.1.5 (affected, NuGet) 5.1.6 (affected, NuGet) 5.2.0 (affected, NuGet) 5.2.1 (affected, NuGet) 5.2.2 (affected, NuGet) 5.3.0 (affected, NuGet) 5.3.1 (affected, NuGet) 5.3.2 (affected, NuGet) 5.4.0 (affected, NuGet) 5.4.1 (affected, NuGet) 5.4.2 (affected, NuGet) 5.5.0 (affected, NuGet) 5.5.1 (affected, NuGet) 5.6.0 (affected, NuGet) 5.6.1 (affected, NuGet) 5.6.2 (affected, NuGet) 5.7.0 (affected, NuGet) 5.7.1 (affected, NuGet) 5.8.0 (affected, NuGet) 5.8.1 (affected, NuGet) 5.8.2 (affected, NuGet) Ecosystem version events: introduced 0; fixed 5.9.0 Source events (ECOSYSTEM) `[ { "introduced": "0" }, { "fixed": "5.9.0" } ]` Other versions: unaffected	OSV GHSA-5h9g-x5rv-25wg
tinymce/tinymce `tinymce/tinymce` Packagist	4.0.0 (affected, Packagist) 4.0.1 (affected, Packagist) 4.0.10 (affected, Packagist) 4.0.11 (affected, Packagist) 4.0.12 (affected, Packagist) 4.0.13 (affected, Packagist) 4.0.14 (affected, Packagist) 4.0.15 (affected, Packagist) 4.0.16 (affected, Packagist) 4.0.17 (affected, Packagist) 4.0.18 (affected, Packagist) 4.0.19 (affected, Packagist) 4.0.2 (affected, Packagist) 4.0.20 (affected, Packagist) 4.0.21 (affected, Packagist) 4.0.22 (affected, Packagist) 4.0.23 (affected, Packagist) 4.0.24 (affected, Packagist) 4.0.25 (affected, Packagist) 4.0.26 (affected, Packagist) 4.0.27 (affected, Packagist) 4.0.28 (affected, Packagist) 4.0.3 (affected, Packagist) 4.0.4 (affected, Packagist) 4.0.5 (affected, Packagist) 4.0.6 (affected, Packagist) 4.0.7 (affected, Packagist) 4.0.8 (affected, Packagist) 4.0.9 (affected, Packagist) 4.1.0 (affected, Packagist) 4.1.1 (affected, Packagist) 4.1.10 (affected, Packagist) 4.1.2 (affected, Packagist) 4.1.3 (affected, Packagist) 4.1.4 (affected, Packagist) 4.1.5 (affected, Packagist) 4.1.6 (affected, Packagist) 4.1.7 (affected, Packagist) 4.1.8 (affected, Packagist) 4.1.9 (affected, Packagist) 4.2.0 (affected, Packagist) 4.2.1 (affected, Packagist) 4.2.2 (affected, Packagist) 4.2.3 (affected, Packagist) 4.2.4 (affected, Packagist) 4.2.5 (affected, Packagist) 4.2.6 (affected, Packagist) 4.2.7 (affected, Packagist) 4.2.8 (affected, Packagist) 4.3.0 (affected, Packagist) 4.3.1 (affected, Packagist) 4.3.10 (affected, Packagist) 4.3.11 (affected, Packagist) 4.3.12 (affected, Packagist) 4.3.13 (affected, Packagist) 4.3.2 (affected, Packagist) 4.3.3 (affected, Packagist) 4.3.4 (affected, Packagist) 4.3.6 (affected, Packagist) 4.3.7 (affected, Packagist) 4.3.8 (affected, Packagist) 4.3.9 (affected, Packagist) 4.4.0 (affected, Packagist) 4.4.1 (affected, Packagist) 4.4.2 (affected, Packagist) 4.4.3 (affected, Packagist) 4.5.0 (affected, Packagist) 4.5.1 (affected, Packagist) 4.5.12 (affected, Packagist) 4.5.2 (affected, Packagist) 4.5.3 (affected, Packagist) 4.5.4 (affected, Packagist) 4.5.5 (affected, Packagist) 4.5.6 (affected, Packagist) 4.5.7 (affected, Packagist) 4.5.8 (affected, Packagist) 4.5.9 (affected, Packagist) 4.6.0 (affected, Packagist) 4.6.1 (affected, Packagist) 4.6.2 (affected, Packagist) 4.6.3 (affected, Packagist) 4.6.4 (affected, Packagist) 4.6.5 (affected, Packagist) 4.6.6 (affected, Packagist) 4.6.7 (affected, Packagist) 4.7.0 (affected, Packagist) 4.7.1 (affected, Packagist) 4.7.10 (affected, Packagist) 4.7.11 (affected, Packagist) 4.7.12 (affected, Packagist) 4.7.13 (affected, Packagist) 4.7.2 (affected, Packagist) 4.7.3 (affected, Packagist) 4.7.4 (affected, Packagist) 4.7.5 (affected, Packagist) 4.7.6 (affected, Packagist) 4.7.7 (affected, Packagist) 4.7.8 (affected, Packagist) 4.7.9 (affected, Packagist) 4.8.0 (affected, Packagist) 4.8.1 (affected, Packagist) 4.8.2 (affected, Packagist) 4.8.3 (affected, Packagist) 4.8.4 (affected, Packagist) 4.8.5 (affected, Packagist) 4.9.0 (affected, Packagist) 4.9.1 (affected, Packagist) 4.9.10 (affected, Packagist) 4.9.11 (affected, Packagist) 4.9.2 (affected, Packagist) 4.9.3 (affected, Packagist) 4.9.4 (affected, Packagist) 4.9.5 (affected, Packagist) 4.9.6 (affected, Packagist) 4.9.7 (affected, Packagist) 4.9.8 (affected, Packagist) 4.9.9 (affected, Packagist) 5.0.0 (affected, Packagist) 5.0.1 (affected, Packagist) 5.0.10 (affected, Packagist) 5.0.11 (affected, Packagist) 5.0.12 (affected, Packagist) 5.0.13 (affected, Packagist) 5.0.14 (affected, Packagist) 5.0.15 (affected, Packagist) 5.0.16 (affected, Packagist) 5.0.2 (affected, Packagist) 5.0.3 (affected, Packagist) 5.0.4 (affected, Packagist) 5.0.5 (affected, Packagist) 5.0.6 (affected, Packagist) 5.0.7 (affected, Packagist) 5.0.8 (affected, Packagist) 5.0.9 (affected, Packagist) 5.1.0 (affected, Packagist) 5.1.1 (affected, Packagist) 5.1.2 (affected, Packagist) 5.1.3 (affected, Packagist) 5.1.4 (affected, Packagist) 5.1.5 (affected, Packagist) 5.1.6 (affected, Packagist) 5.2.0 (affected, Packagist) 5.2.1 (affected, Packagist) 5.2.2 (affected, Packagist) 5.3.0 (affected, Packagist) 5.3.1 (affected, Packagist) 5.3.2 (affected, Packagist) 5.4.0 (affected, Packagist) 5.4.1 (affected, Packagist) 5.4.2 (affected, Packagist) 5.5.0 (affected, Packagist) 5.5.1 (affected, Packagist) 5.6.0 (affected, Packagist) 5.6.1 (affected, Packagist) 5.6.2 (affected, Packagist) 5.7.0 (affected, Packagist) 5.7.1 (affected, Packagist) 5.8.0 (affected, Packagist) 5.8.1 (affected, Packagist) 5.8.2 (affected, Packagist) Ecosystem version events: introduced 0; fixed 5.9.0 Source events (ECOSYSTEM) `[ { "introduced": "0" }, { "fixed": "5.9.0" } ]` Other versions: unaffected	OSV GHSA-5h9g-x5rv-25wg

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

CVSS assessments

CVSS scores, vectors and reporting authorities
Version / score	Vector	Authority
3.1 / 6.1 medium	`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N`	ADP: CISA-ADP

Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

References

https://github.com/tinymce/tinymce/security/advisories/GHSA-5h9g-x5rv-25wgCNA: VulnCheck · vendor-advisory
https://www.tiny.cloud/docs/release-notes/release-notes59/#securityfixesCNA: VulnCheck · related
https://github.com/advisories/GHSA-5h9g-x5rv-25wgCNA: VulnCheck · vendor-advisory
https://vulncheck.com/advisories/vc-advisory-GHSA-5h9g-x5rv-25wgCNA: VulnCheck · third-party-advisory
https://github.com/tinymce/tinymce/security/advisories/GHSA-5h9g-x5rv-25wgADP: CVE · vendor-advisory, x_transferred
https://www.tiny.cloud/docs/release-notes/release-notes59/#securityfixesADP: CVE · related, x_transferred
https://github.com/advisories/GHSA-5h9g-x5rv-25wgADP: CVE · third-party-advisory, x_transferred
https://vulncheck.com/advisories/vc-advisory-GHSA-5h9g-x5rv-25wgADP: CVE · third-party-advisory, x_transferred
https://github.com/advisories/GHSA-5h9g-x5rv-25wgOSV / GitHub Security Advisories · advisory
https://osv.dev/vulnerability/GHSA-5h9g-x5rv-25wgOSV / GitHub Security Advisories · osv

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