TinyMCE is an open source rich text editor. A mutation cross-site scripting (mXSS) vulnerability was discovered in TinyMCE’s core undo/redo functionality and other APIs and plugins. Text nodes within specific parents are not escaped upon serialization according to the HTML standard. If such text nodes contain a special character reserved as an internal marker, they can be combined with other HTML patterns to form malicious snippets. These snippets pass the initial sanitisation layer when the content is parsed into the editor body, but can trigger XSS when the special internal marker is removed from the content and re-parsed. his vulnerability has been patched in TinyMCE versions 6.7.3 and 5.10.9. Users are advised to upgrade. There are no known workarounds for this vulnerability.
CVE-2023-48219
This medium-severity CVE scores 6.1 under NVD CVSS v3. EPSS exploit probability: 2.1%, top 16% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
- Lower severity and no public exploit yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 6.1
- EG Score
- 6.1(medium)
- EPSS
- 49.4%
- KEV
- Not listed
Published
November 15, 2023
Last Modified
June 17, 2026
References (6)
- security-advisories@githubhttps://github.com/tinymce/tinymce/security/advisories/GHSA-v626-r774-j7f8
- security-advisories@githubhttps://tiny.cloud/docs/release-notes/release-notes5109/
- security-advisories@githubhttps://tiny.cloud/docs/tinymce/6/6.7.3-release-notes/
- af854a3a-2127-422b-91ae-364da2661108https://github.com/tinymce/tinymce/security/advisories/GHSA-v626-r774-j7f8
- af854a3a-2127-422b-91ae-364da2661108https://tiny.cloud/docs/release-notes/release-notes5109/
- af854a3a-2127-422b-91ae-364da2661108https://tiny.cloud/docs/tinymce/6/6.7.3-release-notes/
Affected Packages
(3 across 3 ecosystems)
npm(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| tinymce | — | 6.7.3 | — |
NuGet(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| TinyMCE | 6.0.0 ... 6.7.2 (20 versions) | 6.7.3 | — |
Packagist(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| tinymce/tinymce | 6.0.0 ... 6.7.2 (22 versions) | 6.7.3 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 9× in last 7d / 46× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
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- 2026-05-24 13:47 UTCEG score recompute
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Frequently asked(5)
What is CVE-2023-48219?
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Dependency Blast Radius
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