CVE-2019-17003Public exploitNetwork attack vector

Cross-site scripting via executable QR-code URL

Published Feb 16, 2023 · Updated Mar 19, 2025

Cross-site scripting in Firefox for iOS 25 and earlier allows attackers to execute JavaScript after a user scans a crafted QR code. The QR-code scanner accepts a decoded javascript: URL from an external source and opens it in the current browsing context instead of restricting the input to HTTP or HTTPS. Exploitation requires user interaction and grants the injected script access to the current page context, enabling page-data reads and modification.

CVSS severity6.1
Medium
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Firefox for iOS 25 and earlier allows attackers to execute JavaScript after a user scans a crafted QR code. The QR-code scanner accepts a decoded javascript: URL from an external source and opens it in the current browsing context instead of restricting the input to HTTP or HTTPS. Exploitation requires user interaction and grants the injected script access to the current page context, enabling page-data reads and modification.

The record

CVE
CVE-2019-17003
Published
Feb 16, 2023
Updated
Mar 19, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1204
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 16, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 19, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.1NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204User Execution

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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