CVE-2022-31147Public exploitNetwork attack vector

JavaScript hang via exponential url2 regex backtracking

Published Jul 14, 2022 · Updated Apr 23, 2025

ReDoS in jQuery Validation Plugin before 1.19.5 allows remote attackers to hang JavaScript execution with crafted URL input. The url2 validation rule applies an inefficient URL regular expression that backtracks exponentially on strings such as // followed by repeated 00. Reachability requires an application to pass attacker-controlled text to url2; successful input stalls the executing browser or Node.js process without reading or changing data.

CVSS severity7.5
High
EPSS probability2.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

ReDoS in jQuery Validation Plugin before 1.19.5 allows remote attackers to hang JavaScript execution with crafted URL input. The url2 validation rule applies an inefficient URL regular expression that backtracks exponentially on strings such as // followed by repeated 00. Reachability requires an application to pass attacker-controlled text to url2; successful input stalls the executing browser or Node.js process without reading or changing data.

The record

CVE
CVE-2022-31147
Published
Jul 14, 2022
Updated
Apr 23, 2025
Vendor
jQuery Validation
Product
jQuery Validation Plugin
Classifications
CWE-1333, CAPEC-492, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 14, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.19.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

jQuery Validation · jQuery Validation Pluginversion=< 1.19.5

Published CVSS scores

7.5GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-1333Inefficient Regular Expression Complexity
CAPEC-492Regular Expression Exponential Blowup
T1499Endpoint Denial of Service

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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