CVE-2021-26272: Inclusion of Functionality from Untrusted Control Sphere

January 26, 2021 (updated March 1, 2022)

It was possible to execute a ReDoS-type attack inside CKEditor 4 by persuading a victim to paste crafted URL-like text into the editor, and then press Enter or Space (in the Autolink plugin).

References

nvd.nist.gov/vuln/detail/CVE-2021-26272

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