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CVE-2021-3822

25
FAUCET Score

CVE-2021-3822 describes an Inefficient Regular Expression Complexity vulnerability (CWE-1333, CWE-400) affecting jsoneditor and jsoneditoronline. This high-severity vulnerability (CVSS 7.5) allows an unauthenticated attacker to remotely trigger a denial-of-service condition with low attack complexity. While the vulnerability has a high potential impact on availability, there is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding it.

Impacted Technologies

VendorProductVersion(s)CPE
< 9.5.6CPE matchmatch criteria
cpe:2.3:a:jsoneditoronline:jsoneditor:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.3MEDIUM

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.42%
Probability of exploitation in next 30 days
EPSS Percentile
70.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0142 is in the 51st percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: jsoneditorFixed in: 9.5.6

Vendor Advisories (1)

npmGHSA-hhfg-6hfc-rvxmmedium

Regular Expression Denial of Service in jsoneditor

Sep 29, 2021

References

github.com / josdejong/jsoneditor/commit/092e386cf49f2a1450625617da8e0137ed067c3e
PatchThird Party Advisory
huntr.dev / bounties/1e3ed803-b7ed-42f1-a4ea-c4c75da9de73
ExploitPatchThird Party Advisory