CVE-2024-53975VulnerabilityPublished 26 Nov 2024Updated 28 Oct 2025

CVE-2024-53975: Mozilla Firefox for iOS · SSL security padlock icon could be visually spoofed to look secure on an HTTP page

Affects Mozilla Firefox for iOSSource CVE Database V5

Not known to be exploited · CVSS 5.4 Medium : upgrade to 133 when convenient.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 3.1 base score

5.4Medium

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

EPSS: 0.2% chance of exploitation in 30 days – higher than 20% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 133

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

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

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: Low: Performance is reduced or there are interruptions in resource availability. Even if repeated exploitation of the vulnerability is possible, the attacker does not have the ability to completely deny service to legitimate users. The resources in the impacted component are either partially available all of the time, or fully available only some of the time, but overall there is no direct, serious consequence to the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 26 Nov 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 2026-10-25.

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 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 for iOS to 133.

Affected software

Product	Affected	Fixed in
Mozilla Firefox for iOS	Affected <133	Fixed in 133

AI-suggested

1. Update Firefox for iOS to version 133 or later as soon as the patch is released to ensure the vulnerability is fixed. 2. Until patching is possible, educate users to verify site security by checking the full URL scheme (https://) rather than relying solely on the padlock icon. 3. Implement mobile device management (MDM) policies to enforce browser updates and restrict installation of outdated app versions. 4. Use network-level protections such as DNS filtering and web proxies that can block access to known phishing or malicious sites. 5. Encourage the use of multi-factor authentication (MFA) to reduce the impact of credential theft resulting from phishing. 6. Monitor for phishing campaigns targeting Firefox for iOS users and provide timely threat intelligence updates to users and security teams. 7. Conduct user awareness training focused on recognizing spoofed security indicators and safe browsing practices on mobile devices. 8. Consider deploying endpoint detection and response (EDR) solutions capable of monitoring mobile device browser activity for suspicious behavior.

Description

Accessing a non-secure HTTP site that uses a non-existent port may cause the SSL padlock icon in the location URL bar to, misleadingly, appear secure. This vulnerability affects Firefox for iOS < 133.

Impact

For European organizations, this vulnerability primarily poses a risk to end users who rely on Firefox for iOS for web browsing. The misleading padlock icon can cause users to trust non-secure HTTP sites as if they were secure HTTPS sites, increasing the likelihood of successful phishing attacks or interception of sensitive information by attackers on the same network. This can lead to credential theft, unauthorized access, or data manipulation. While the vulnerability does not directly expose confidential data through a technical flaw, the social engineering risk is significant. Organizations with employees or customers in Europe using Firefox for iOS are at risk of targeted phishing campaigns exploiting this UI spoofing. Sectors with high security requirements such as finance, healthcare, and government are particularly vulnerable to the downstream effects of user deception. The mobile nature of the vulnerability means it can affect remote workers and mobile users, complicating detection and response. The impact on operational availability is low but the reputational damage and potential regulatory implications of data breaches resulting from phishing could be substantial.

References

Community reviews

Loading reviews…

Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 28 Oct 2025, 15:02 UTC

Technical details

References

Community reviews

Related threats