CVE-2024-0742Network attack vector

Prompt manipulation via incorrect input timestamp

Published Jan 23, 2024 · Updated May 30, 2025

UI validation in Mozilla Firefox before 122, Firefox ESR before 115.7, and Thunderbird before 115.7 allows remote attackers to manipulate prompts. The post-load input guard uses an incorrect user-input timestamp, so clicks can activate or dismiss browser prompts and dialogs that should still reject input. Exploitation requires a user to load attacker-controlled content and interact at the crafted time; the bounded impact is unintended dialog acceptance or dismissal.

CVSS severity4.3
Medium
EPSS probability0.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

UI validation in Mozilla Firefox before 122, Firefox ESR before 115.7, and Thunderbird before 115.7 allows remote attackers to manipulate prompts. The post-load input guard uses an incorrect user-input timestamp, so clicks can activate or dismiss browser prompts and dialogs that should still reject input. Exploitation requires a user to load attacker-controlled content and interact at the crafted time; the bounded impact is unintended dialog acceptance or dismissal.

The record

CVE
CVE-2024-0742
Published
Jan 23, 2024
Updated
May 30, 2025
Vendor
Mozilla
Product
Firefox
Classifications
T1204
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 23, 2024CVE publishedPublication date reported by the CVE source.
  2. May 30, 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=unspecified <122

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mozilla · Firefoxversion=unspecified <122
Mozilla · Thunderbirdversion=unspecified <115.7
Mozilla · Firefox ESRversion=unspecified <115.7

Published CVSS scores

4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
4.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/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 exploitUnconfirmed

Weakness, pattern, technique

T1204User Execution

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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