CVE-2024-1549Public exploitNetwork attack vector

Permission grants via custom-cursor dialog clickjacking

Published Feb 20, 2024 · Updated Feb 13, 2025

UI redressing in Mozilla Firefox before 123, Firefox ESR before 115.8, and Thunderbird before 115.8 allows remote attackers to obtain permissions. Popup-notification handling leaves a page-defined 128-by-128 offset cursor active over browser-chrome permission dialogs, so its visible pointer can cover one button while the real hotspot selects another. Exploitation requires a user to visit crafted web content and click the disguised control; email reading in Thunderbird is not a vector because scripting is disabled there.

CVSS severity6.1
Medium
EPSS probability0.53%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

UI redressing in Mozilla Firefox before 123, Firefox ESR before 115.8, and Thunderbird before 115.8 allows remote attackers to obtain permissions. Popup-notification handling leaves a page-defined 128-by-128 offset cursor active over browser-chrome permission dialogs, so its visible pointer can cover one button while the real hotspot selects another. Exploitation requires a user to visit crafted web content and click the disguised control; email reading in Thunderbird is not a vector because scripting is disabled there.

The record

CVE
CVE-2024-1549
Published
Feb 20, 2024
Updated
Feb 13, 2025
Vendor
Mozilla
Product
Firefox
Classifications
T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 20, 2024CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 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 <123

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mozilla · Firefoxversion=unspecified <123
Mozilla · Thunderbirdversion=unspecified <115.8
Mozilla · Firefox ESRversion=unspecified <115.8

Published CVSS scores

6.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1189Drive-by Compromise

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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