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CVE-2024-1550

MEDIUM
6.1
CVSS Score
Published: February 20, 2024 at 01:21 PM UTC
Updated: June 17, 2026 at 07:04 AM UTC
4 products affected across 2 vendorsDebian LinuxFirefoxThunderbird

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Severity
MEDIUM6.1
Exploit prediction
EPSS 0.6%
SSVC
No known exploit

Description

A malicious website could have used a combination of exiting fullscreen mode and `requestPointerLock` to cause the user's mouse to be re-positioned unexpectedly, which could have led to user confusion and inadvertently granting permissions they did not intend to grant. This vulnerability affects Firefox < 123, Firefox ESR < 115.8, and Thunderbird < 115.8.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Debian Linux· Debiandrupal
95%
10.0
Firefox· Mozilla
95%
v < 115.8.0v < 123v < 123.0
Affected range stops below 115.8.0, so it looks safe — our inference, not a vendor statement
Affected range stops below 123, so it looks safe — our inference, not a vendor statement
Affected range stops below 123.0, so it looks safe — our inference, not a vendor statement
Thunderbird· Mozilla
95%
v < 115.8v < 115.8.0
Affected range stops below 115.8, so it looks safe — our inference, not a vendor statement
Affected range stops below 115.8.0, so it looks safe — our inference, not a vendor statement
Firefox ESR· Mozilla
60%
v < 115.8
Affected range stops below 115.8, so it looks safe — our inference, not a vendor statement

References (6)

Issue Tracking
Source: [email protected]
https://bugzilla.mozilla.org/show_bug.cgi?id=1860065
Mailing List
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2024/03/msg00000.html
Mailing ListVendor Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2024/03/msg00001.html
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2024-05/
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2024-06/
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2024-07/

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.1MEDIUMCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-1021

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