CVE-2023-4580

Push notifications saved to disk unencrypted

MEDIUM

6.5

CVSS Score

Published: September 11, 2023 at 08:01 AM UTC

Updated: June 17, 2026 at 06:38 AM UTC

3 products affected across 1 vendorFirefoxThunderbirdFirefox ESR

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Severity

MEDIUM6.5

Exploit prediction

EPSS 0.4%

SSVC

No known exploit

Description

Push notifications stored on disk in private browsing mode were not being encrypted potentially allowing the leak of sensitive information. This vulnerability affects Firefox < 117, Firefox ESR < 115.2, and Thunderbird < 115.2.

Affected

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

Firefox · Mozilla

95%

v < 117

Affected range stops below 117, so it looks safe — our inference, not a vendor statement

Affected range stops below 117.0, so it looks safe — our inference, not a vendor statement

Firefox ESR · Mozilla

95%

v < 115.2

Affected range stops below 115.2, so it looks safe — our inference, not a vendor statement

Thunderbird · Mozilla

95%

v < 115.2

Affected range stops below 115.2, 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 (4)

Issue TrackingPermissions Required

Source: [email protected]

https://bugzilla.mozilla.org/show_bug.cgi?id=1843046

Vendor Advisory

Source: [email protected]

https://www.mozilla.org/security/advisories/mfsa2023-34/

Vendor Advisory

Source: [email protected]

https://www.mozilla.org/security/advisories/mfsa2023-36/

Vendor Advisory

Source: [email protected]

https://www.mozilla.org/security/advisories/mfsa2023-38/

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

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

CVSS

6.5MEDIUM[email protected]

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: REQUIRED
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: NONE
Availability: NONE

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-311

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