CKEditor vulnerabilities: known CVEs & security history
CKSource · Web / Editor · 6 tracked CVEs · 0 actively exploited · updated September 2026 · what is a CVE? →
This is the full list of known vulnerabilities (CVEs) across all CKEditor release lines — 6 in total. A CVE here doesn't mean your version is affected — check CKEditor's current status and the safe version to run.
Known CKEditor CVEs
Actively-exploited and most-severe first. Open any CVE for full details.
| CVE | Severity | CVSS | EPSS | Year |
|---|---|---|---|---|
| CVE-2023-31541 | critical | 9.8 | 2% | 2023 |
| CVE-2021-41164 | high | 8.2 | 1% | 2021 |
| CVE-2021-26272 | medium | 6.5 | 2% | 2021 |
| CVE-2021-26271 | medium | 6.5 | 2% | 2021 |
| CVE-2020-27193 | medium | 6.1 | 2% | 2020 |
| CVE-2020-9281 | medium | 6.1 | 4% | 2020 |
Is my CKEditor version affected?
The list above spans every release. To know whether your version is affected — and the minimum safe version to upgrade to — check it directly.
Check your CKEditor version → · Monitor CKEditor for new CVEs →
CKEditor vulnerabilities — frequently asked
How many known vulnerabilities does CKEditor have?
IsItPatched tracks 6 CVEs for CKEditor. 1 is critical-severity and 1 high-severity. These span every release line — what matters is whether the version you run is affected.
Does CKEditor have any actively-exploited vulnerabilities?
None of CKEditor's tracked CVEs are currently in CISA's KEV catalog — but new ones can be added at any time, so keep your version current.
What is the most severe CKEditor vulnerability?
Among tracked issues, CVE-2023-31541 (CRITICAL, CVSS 9.8) ranks highest — a Unrestricted file upload weakness.
Is CKEditor safe to use?
It depends on the version. The latest supported CKEditor release (48.3.1) clears the known issues; older versions may still be affected. Check the exact version you run for a verdict.
CVE data aggregated from NVD, CISA KEV and EPSS (FIRST.org). Related: CKEditor security status · CKEditor end-of-life · actively-exploited CVEs. Always verify against CKSource's advisories — see our disclaimer.