What is CVE-2021-3822?

CVE-2021-3822 is a high-severity vulnerability in Josdejong Josdejong/jsoneditor, classified under Inefficient Regular Expression Complexity. CVSS score: 7.5/10. Published 2021-09-27.

How severe is CVE-2021-3822?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Josdejong Josdejong/jsoneditor

CVE-2021-3822

jsoneditor is vulnerable to Inefficient Regular Expression Complexity

Vulnerability class: ReDoS (Regular Expression Denial of Service)

Published 2021-09-27 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.014 (71.7th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 72nd percentile — 71.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000

Affected products

Josdejong Josdejong/jsoneditor — versions unspecified
Jsoneditoronline Jsoneditor

Weakness classification (CWE)

References

huntr.dev/bounties/1e3ed803-b7ed-42f1-a4ea-c4c75da9de73 (Exploit, Patch, Third Party Advisory)
github.com/josdejong/jsoneditor/commit/092e386cf49f2a1450625617da8e0137ed067c3e (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-3822?: CVE-2021-3822 is a high-severity vulnerability in Josdejong Josdejong/jsoneditor, classified under Inefficient Regular Expression Complexity. CVSS score: 7.5/10. Published 2021-09-27.
How severe is CVE-2021-3822?: High severity. CVSS v3 base score is 7.5 out of 10.