Inefficient regular expression complexity in tinymce - #VU131915
Published: January 6, 2021 / Updated: May 20, 2026
Vulnerability identifier: #VU131915
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: N/A
CWE-ID: CWE-1333
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: tinymce
Affected software:
tinymce
tinymce
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to inefficient regular expression complexity in the codesample plugin dependency when performing syntax highlighting of ruby code samples. A remote attacker can supply a poorly formed ruby code sample to cause a denial of service.
The issue can lock up the browser during syntax highlighting.
Remediation
Install security update from vendor's website.