CVE-2023-4580

MEDIUMNVD 6.56.5—

6.5

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.

CVSS v3: 6.5
EG Score: 6.5(medium)
EPSS: 21.3%
KEV: Not listed

Published

September 11, 2023

Last Modified

November 21, 2024

References (8)

security@mozillahttps://bugzilla.mozilla.org/show_bug.cgi?id=1843046
security@mozillahttps://www.mozilla.org/security/advisories/mfsa2023-34/
security@mozillahttps://www.mozilla.org/security/advisories/mfsa2023-36/
security@mozillahttps://www.mozilla.org/security/advisories/mfsa2023-38/
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.mozilla.org/show_bug.cgi?id=1843046
af854a3a-2127-422b-91ae-364da2661108https://www.mozilla.org/security/advisories/mfsa2023-34/
af854a3a-2127-422b-91ae-364da2661108https://www.mozilla.org/security/advisories/mfsa2023-36/
af854a3a-2127-422b-91ae-364da2661108https://www.mozilla.org/security/advisories/mfsa2023-38/

Patch Availability(17)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	firefox-mozsymbols (117.0+build2-0ubuntu0.20.04.1) @ focal	2026-05-24	ubuntu
ubuntu	xul-ext-lightning (1:115.3.1+build1-0ubuntu0.23.04.1) @ lunar	2026-05-24	ubuntu
redhat	firefox-0:102.15.0-1.el7_9	2023-09-07	redhat
redhat	firefox-0:102.15.0-1.el9_2	2023-09-04	redhat
redhat	thunderbird-0:102.15.0-1.el8_1	2023-09-04	redhat
redhat	thunderbird-0:102.15.0-1.el8_2	2023-09-04	redhat
redhat	firefox-0:102.15.0-1.el8_4	2023-09-04	redhat
redhat	thunderbird-0:102.15.0-1.el9_0	2023-09-04	redhat
redhat	thunderbird-0:102.15.0-1.el9_2	2023-09-04	redhat
redhat	thunderbird-0:102.15.0-1.el8_8	2023-09-04	redhat
redhat	thunderbird-0:102.15.0-1.el8_4	2023-09-04	redhat
redhat	firefox-0:102.15.0-1.el8_1	2023-09-04	redhat
redhat	firefox-0:102.15.0-1.el8_2	2023-09-04	redhat
redhat	firefox-0:102.15.0-1.el8_8	2023-09-04	redhat
redhat	firefox-0:102.15.0-1.el8_6	2023-09-04	redhat
redhat	firefox-0:102.15.0-1.el9_0	2023-09-04	redhat
redhat	thunderbird-0:102.15.0-1.el7_9	2023-09-04	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-311Missing Encryption of Sensitive Data

All Vendor Advisories

(17)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 10× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:43 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-24 17:51 UTCEG score recompute
2026-05-24 17:51 UTCVendor advisory
2026-05-24 17:51 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2023-4580?

CVE-2023-4580 is a medium vulnerability published on September 11, 2023. 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.

When was CVE-2023-4580 disclosed?

CVE-2023-4580 was first published in the National Vulnerability Database on September 11, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2023-4580 actively exploited?

CVE-2023-4580 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 21.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2023-4580?

CVE-2023-4580 has a CVSS v3 base score of 6.5 (NVD).

How do I remediate CVE-2023-4580?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-4580, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2023-4580

Published

Last Modified

References (8)

Patch Availability(17)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2023-4580?

Same vendor

Same CWE

CVE-2023-4580

📅 Published

🔄 Last Modified

🔗 References (8)

Patch Availability(17)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2023-4580?

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References (8)

Frequently asked(5)

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