---
id: CVE-2023-5758
title: >-
  When opening a page in reader mode, the redirect URL could have caused
  attacker-controlled script to execute in a reflected Cross-Site Scripting
  (XSS) attack
summary: >-
  When opening a page in reader mode, the redirect URL could have caused
  attacker-controlled script to execute in a reflected Cross-Site Scripting
  (XSS) attack. This vulnerability affects Firefox for iOS < 119.
severity: medium
cvss: 6.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
  - CWE-79
vendor: mozilla
product: firefox_mobile
affected:
  - firefox_mobile < 119.0
patched:
  - firefox_mobile 119.0
published: '2023-10-25'
updated: '2026-08-19'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2023-5758'
references:
  - url: 'https://bugzilla.mozilla.org/show_bug.cgi?id=1850019'
    label: security@mozilla.org
  - url: 'https://security.gentoo.org/glsa/202401-10'
    label: security@mozilla.org
  - url: 'https://www.mozilla.org/security/advisories/mfsa2023-48/'
    label: security@mozilla.org
  - url: 'https://bugzilla.mozilla.org/show_bug.cgi?id=1850019'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://security.gentoo.org/glsa/202401-10'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://www.mozilla.org/security/advisories/mfsa2023-48/'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00433
epssPercentile: 0.34953
ingestedAt: '2026-08-19T15:41:16.020Z'
---

## Overview

When opening a page in reader mode, the redirect URL could have caused attacker-controlled script to execute in a reflected Cross-Site Scripting (XSS) attack. This vulnerability affects Firefox for iOS < 119.

## Affected

- `firefox_mobile < 119.0`

## Remediation

Upgrade past the affected range:

- `firefox_mobile 119.0`