CVE-2022-1243Public exploitNetwork attack vector

Cross-site scripting via embedded URL whitespace

Published Apr 5, 2022 · Updated Aug 2, 2024

Improper input validation in medialize URI.js before 1.19.11 allows remote attackers to trigger cross-site scripting via crafted URLs. URI.parse() strips only leading whitespace, so embedded carriage returns, line feeds, and tabs split a javascript scheme and cause the protocol check to misclassify it. Exploitation requires an application to trust the parsed protocol as a safety gate and then place the original attacker-controlled URL into HTML or JavaScript, enabling script execution in the application's browser context.

CVSS severity7.2
High
EPSS probability0.67%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in medialize URI.js before 1.19.11 allows remote attackers to trigger cross-site scripting via crafted URLs. URI.parse() strips only leading whitespace, so embedded carriage returns, line feeds, and tabs split a javascript scheme and cause the protocol check to misclassify it. Exploitation requires an application to trust the parsed protocol as a safety gate and then place the original attacker-controlled URL into HTML or JavaScript, enabling script execution in the application's browser context.

The record

CVE
CVE-2022-1243
Published
Apr 5, 2022
Updated
Aug 2, 2024
Vendor
medialize
Product
URI.js
Classifications
CWE-20, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 5, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record 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=unspecified <1.19.11

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

medialize · URI.jsversion=unspecified <1.19.11

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
7.2huntr.dev CNACVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/A:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-20Improper Input Validation
T1059.007JavaScript/JScript

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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