---
id: CVE-2023-49061
title: >-
  An attacker could have performed HTML template injection via Reader Mode and
  exfiltrated user information
summary: >-
  An attacker could have performed HTML template injection via Reader Mode and
  exfiltrated user information. This vulnerability affects Firefox for iOS <
  120.
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-601
vendor: mozilla
product: firefox_mobile
affected:
  - firefox_mobile < 120.0
patched:
  - firefox_mobile 120.0
published: '2023-11-21'
updated: '2026-08-19'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2023-49061'
references:
  - url: 'https://bugzilla.mozilla.org/show_bug.cgi?id=1861420'
    label: security@mozilla.org
  - url: 'https://www.mozilla.org/security/advisories/mfsa2023-51/'
    label: security@mozilla.org
  - url: 'https://bugzilla.mozilla.org/show_bug.cgi?id=1861420'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://www.mozilla.org/security/advisories/mfsa2023-51/'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00312
epssPercentile: 0.21657
ingestedAt: '2026-08-19T15:41:16.090Z'
---

## Overview

An attacker could have performed HTML template injection via Reader Mode and exfiltrated user information. This vulnerability affects Firefox for iOS < 120.

## Affected

- `firefox_mobile < 120.0`

## Remediation

Upgrade past the affected range:

- `firefox_mobile 120.0`