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CVE-2024-21911

21
FAUCET Score

CVE-2024-21911 is a stored cross-site scripting (XSS) vulnerability affecting TinyMCE versions prior to 5.6.0. An unauthenticated, remote attacker can inject malicious HTML into the editor, leading to arbitrary JavaScript execution in another user's browser. With a CVSS score of 6.1 (Medium), this vulnerability requires user interaction (UI:R) and has a low impact on confidentiality and integrity (C:L/I:L). There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 5.6.0CPE matchmatch criteria
cpe:2.3:a:tiny:tinymce:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.1MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.17%
Probability of exploitation in next 30 days
EPSS Percentile
64.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0117 is in the 77th percentile among its peer group of 26,221 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

composerpatch availablevia ghsa
Product: tinymce/tinymceFixed in: 5.6.0
npmpatch availablevia ghsa
Product: tinymceFixed in: 5.6.0
nugetpatch availablevia ghsa
Product: TinyMCEFixed in: 5.6.0

Vendor Advisories (1)

npmGHSA-w7jx-j77m-wp65medium

Cross-site scripting vulnerability in TinyMCE

Jan 6, 2021

References

github.com / advisories/GHSA-w7jx-j77m-wp65
ExploitThird Party Advisory
github.com / tinymce/tinymce/security/advisories/GHSA-w7jx-j77m-wp65
ExploitThird Party Advisory
vulncheck.com / advisories/vc-advisory-GHSA-w7jx-j77m-wp65
Third Party Advisory
npmjs.com / package/tinymce
Release Notes
tiny.cloud / docs/release-notes/release-notes56
Release Notes