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Fencer Intel
medium 5.4

GHSA-wqm8-jx8r-8rcq json

Cross-site scripting vulnerabilities in old version of bundled TinyMCE

published 3y ago modified last yr.

cvss
5.4
version 3.1, GitHub
cisa kev
Not listed
not in CISA's catalog
epss
—
no score, EPSS covers CVEs only
public exploits
0
none known

Summary

An old version of TinyMCE include an XSS vulnerability, which was patched in a later version. This was described by TinyMCE:

> A cross-site scripting (XSS) vulnerability was discovered in the core parser. The vulnerability allowed arbitrary JavaScript execution when inserting a specially crafted piece of content into the editor via the clipboard or APIs. This impacts all users who are using TinyMCE 4.9.10 or lower and TinyMCE 5.4.0 or lower.

We reviewed the potential impact of this vulnerability within the context of Silverstripe CMS. We concluded this is a medium impact vulnerability given how TinyMCE is used by Silverstripe CMS.

Reported by: Developers at ACC

Patch / fix

  • packagist silverstripe/admin 1.12.7

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CVSS scores

assigned by version score vector
GitHub 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
packagist silverstripe/admin
<1.12.7
1.12.7

References

Sources

Fencer Intel 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.