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CVE-2023-45818

21
FAUCET Score

CVE-2023-45818 is a mutation cross-site scripting (mXSS) vulnerability affecting TinyMCE 5 and 6, specifically within its undo/redo functionality. A carefully crafted HTML snippet, after passing sanitization, can be maliciously mutated upon restoration from the undo stack due to string manipulation and reparative parsing, leading to XSS execution. This vulnerability has a CVSS score of 6.1 (Medium), indicating a network-based attack requiring user interaction, with potential for low impact on confidentiality and integrity. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 5.10.8CPE matchmatch criteria
cpe:2.3:a:tiny:tinymce:*:*:*:*:*:*:*:*
>= 6.0.0, < 6.7.1CPE 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
0.62%
Probability of exploitation in next 30 days
EPSS Percentile
46.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0062 is in the 49th percentile among its peer group of 26,219 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 (7)

composerpatch availablevia ghsa
Product: tinymce/tinymceFixed in: 6.7.1
composerpatch availablevia ghsa
Product: tinymce/tinymceFixed in: 5.10.8
npmpatch availablevia ghsa
Product: tinymceFixed in: 5.10.8
npmpatch availablevia ghsa
Product: tinymceFixed in: 6.7.1
nugetpatch availablevia ghsa
Product: TinyMCEFixed in: 5.10.8
nugetpatch availablevia ghsa
Product: TinyMCEFixed in: 6.7.1
github_advisoryvendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

npmGHSA-v65r-p3vv-jjfvmedium

TinyMCE mXSS vulnerability in undo/redo, getContent API, resetContent API, and Autosave plugin

Oct 19, 2023

References

github.com / tinymce/tinymce/security/advisories/GHSA-v65r-p3vv-jjfv
Vendor Advisory
researchgate.net / publication/266654651_mXSS_attacks_Attacking_well-secured_web-applications_by_using_innerHTML_mutations
Third Party Advisory
tiny.cloud / docs/release-notes/release-notes5108
Release Notes
tiny.cloud / docs/tinymce/6/6.7.1-release-notes
Release Notes
tiny.cloud / docs/api/tinymce.html/tinymce.html.saxparser
Product