VulnerabilityPublished 23 Jan 2024Updated 30 May 2025

CVE-2024-0742: Mozilla Firefox · Failure to Update User Input Timestamp

Affects Mozilla FirefoxSource CVE Database V5

Not known to be exploited · CVSS 4.3 Medium : upgrade to 122 or 115.7 when convenient.

Data as of 26 Oct 2026, 10:12 UTC

CVSS 3.1 base score

4.3Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.5% chance of exploitation in 30 days – higher than 48% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 122, 115.7

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: Required
Scope: Unchanged
Confidentiality: None
Integrity: Low
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: Required: Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: None: There is no loss of confidentiality within the impacted component.
Integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact on the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 23 Jan 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade Mozilla Firefox to 122 or 115.7.

Affected software

Product	Affected	Fixed in
Mozilla Firefox	Affected <122 <115.7	Fixed in 122 115.7

AI-suggested

Organizations should prioritize updating Mozilla Firefox, Firefox ESR, and Thunderbird to versions 122, 115.7, or later respectively, where this vulnerability is patched. Beyond patching, user training should emphasize cautious interaction with browser prompts and dialogs, especially those appearing unexpectedly or on untrusted sites. Deploying browser security extensions that restrict or monitor dialog behavior can add an additional layer of defense. Network-level protections such as web filtering and anti-phishing solutions should be tuned to detect and block suspicious content that attempts to exploit UI interaction flaws. For managed environments, enforcing policies that limit browser extensions and scripts from triggering dialogs without explicit user initiation can reduce attack surface. Continuous monitoring of browser update advisories and rapid deployment of patches is critical to minimize exposure.

Description

It was possible for certain browser prompts and dialogs to be activated or dismissed unintentionally by the user due to an incorrect timestamp used to prevent input after page load. This vulnerability affects Firefox < 122, Firefox ESR < 115.7, and Thunderbird < 115.7.

Impact

For European organizations, this vulnerability could be exploited in targeted phishing or social engineering campaigns where attackers craft web content that manipulates browser dialogs to gain unintended user consent or dismiss security warnings. Although the vulnerability does not allow direct code execution or data exfiltration, the integrity of user decisions can be compromised, potentially leading to further exploitation such as unauthorized permission grants or bypassing security prompts. Organizations relying heavily on Firefox or Thunderbird for email and web access may face increased risk of user-based attacks, especially in sectors with high regulatory compliance requirements like finance, healthcare, and government. The impact is more pronounced in environments where users are less trained to recognize suspicious browser behavior or where automated security controls depend on user confirmations.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 8 Jul 2025, 19:42 UTC

Technical details

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