CKEditor 4 · Version Status
CKEditor 4 End of Life Date
CKEditor 4 end-of-life date, support status, and CVE risk. Data from endoflife.date and official vendor documentation.
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CKEditor 4 is past end of life. Standard support ended June 30, 2023. Patches continue until December 1, 2028 only under CKEditor 4 LTS, a paid programme — if you are not covered by it, this version is unpatched today.
EOL Date
Jun 30, 2023
1136 days past EOL
Latest Release
4.25.1
LTS release
Release Date
Nov 23, 2012
CKEditor 4 series
Extended Support
Dec 1, 2028
CKEditor 4 LTS · paid
Lifecycle detail
CKEditor 4 was released on November 23, 2012 and support ended on June 30, 2023 — a supported lifespan of 10 years and 7 months. It was a long-term support (LTS) release, so it received a longer patch window than the interim releases around it. The last patch it will ever receive is 4.25.1, published February 5, 2025 — 1 year and 7 months after the published end-of-life date. It has been without security patches for 3 years and 1 month.
Attack Surface
10/30 Medium tier
CISA KEV Exposure
0/20 Not in KEV
Extended Support
0/10 Available
EOL Risk Score™ — proprietary methodology by endoflife.ai. Factors: EOL recency, attack surface breadth, CISA KEV catalog presence, extended support availability. Updated at every build.
Methodology → ·
View score card →
Extended Support
Extended CKEditor 4 support is available
Commercial vendors offer security patches beyond EOL. Compare your options.
Compare Options →
| Version | Latest | EOL Date | Status |
|---|
| → 4 LTS |
4.25.1 |
Jun 30, 2023 |
EOL |
| 5 |
48.3.1 |
EOL |
Active |
What does CKEditor 4 end of life mean?
When CKEditor 4 reaches end of life, the maintainers stop issuing security patches for this version. CVEs discovered after the EOL date are publicly disclosed on the National Vulnerability Database with no patch available. Exploit code frequently appears on GitHub within days of disclosure.
The CVE blind spot: Most vulnerability scanners check for known CVEs but do not flag the ongoing accumulation of unpatched vulnerabilities in EOL software versions. Running CKEditor 4 past its EOL date creates a permanently growing attack surface that standard security tooling will not surface.
Migrate to CKEditor 5 or implement compensating controls — network segmentation, enhanced monitoring, restricted access — while migration is underway.
Frequently Asked Questions
When does CKEditor 4 reach end of life?
CKEditor 4 reached end of life on June 30, 2023. This version is no longer receiving security patches.
Is CKEditor 4 still supported?
No. CKEditor 4 reached end of life on June 30, 2023 and is no longer receiving security patches.
What should I upgrade to from CKEditor 4?
The recommended upgrade from CKEditor 4 is
CKEditor 5 — the latest actively supported version. Check the
CKEditor full timeline for all supported versions.
What are the security risks of running CKEditor 4 past EOL?
When CKEditor 4 reaches end of life, the maintainers stop issuing security patches. Any CVEs disclosed after the EOL date accumulate with no remediation path. Most vulnerability scanners do not flag this — it is the CVE blind spot. Organizations running EOL CKEditor should migrate immediately or implement compensating controls.