CVE-2024-21908 json
Cross-site scripting vulnerability in TinyMCE
published 2021-10-22 5 y ago modified 2026-11-08 24 h ago also EUVD-2021-2161 , GHSA-5h9g-x5rv-25wg
- cvss
- 6.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.1%
- EPSS 1.1% chance of exploitation in 30 days, percentile 64%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- npm tinymce 5.9.0
- nuget TinyMCE 5.9.0
- packagist tinymce/tinymce 5.9.0
- tiny tinymce 5.9.0
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 y ago
Exploit prediction
1.07% chance of exploitation in the next 30 days, higher than 64% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/tinymce/tinymce/security/advisories/GHSA-5h9g-x5rv-25wg referenced PoC, tagged "exploit" by a source, unverified
- github.com https://github.com/advisories/GHSA-5h9g-x5rv-25wg referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| GitHub | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| CNA | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | tinymce | <5.9.0 |
5.9.0 |
| nuget | TinyMCE | <5.9.0 |
5.9.0 |
| packagist | tinymce/tinymce | <5.9.0 |
5.9.0 |
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/tinymce/tinymce/security/advisories/GHSA-5h9g-x5rv-25wg
vendor-advisory, web, exploit, third-party-advisory
-
github.com
/advisories/GHSA-5h9g-x5rv-25wg
vendor-advisory, third-party-advisory, exploit
-
tiny.cloud
/docs/release-notes/release-notes59/#securityfixes
related, web, release-notes
-
vulncheck.com
/advisories/vc-advisory-GHSA-5h9g-x5rv-25wg
third-party-advisory
-
github.com
/tinymce/tinymce
package
Sources
- CVE List CVE-2024-21908
- GitHub Advisory GHSA-5h9g-x5rv-25wg
- NVD CVE-2024-21908
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.