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CVE-2024-5690

MEDIUM
4.3
CVSS Score
Published: June 11, 2024 at 12:40 PM UTC
Updated: June 17, 2026 at 08:16 AM UTC
4 products affected across 2 vendorsDebian LinuxFirefoxThunderbird

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Severity
MEDIUM4.3
Exploit prediction
EPSS 0.7%
SSVC
No known exploit

Description

By monitoring the time certain operations take, an attacker could have guessed which external protocol handlers were functional on a user's system. This vulnerability affects Firefox < 127, Firefox ESR < 115.12, and Thunderbird < 115.12.

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 < 127
Affected range stops below 127, so it looks safe — our inference, not a vendor statement
Affected range stops below 127.0, so it looks safe — our inference, not a vendor statement
Firefox ESR· Mozilla
95%
v < 115.12
Affected range stops below 115.12, so it looks safe — our inference, not a vendor statement
Thunderbird· Mozilla
95%
v < 115.12
Affected range stops below 115.12, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (6)

Issue TrackingPermissions Required
Source: [email protected]
https://bugzilla.mozilla.org/show_bug.cgi?id=1883693
Mailing List
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2024/06/msg00000.html
Mailing List
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2024/06/msg00010.html
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2024-25/
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2024-26/
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2024-28/

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

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

CVSS

4.3MEDIUMCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-203

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