VulnerabilityPublished 2 Jun 2023Updated 18 Dec 2025

CVE-2023-23600: Mozilla Firefox

Affects Mozilla FirefoxSource CVE Database V5

Not known to be exploited : upgrade to 109 when convenient.

Data as of 26 Oct 2026, 10:12 UTC

Severity

Medium

Rated Medium by the CNA (mozilla) · No CVSS score from NVD or the CNA

EPSS: 0.4% chance of exploitation in 30 days – higher than 42% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 109

Exploitation evidence

Disclosed: evidence found.
CVE published 2 Jun 2023
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade Mozilla Firefox to 109.

Affected software

Product	Affected	Fixed in
Mozilla Firefox	Affected <109	Fixed in 109

AI-suggested

Mozilla fixed this vulnerability in Firefox 109. Users should update Firefox for Android to version 109 or later to remediate this issue. No additional mitigation steps are required as the fix is available and official.

Description

CVE-2023-23600 is a vulnerability in Firefox for Android versions prior to 109 where notification permissions were stored without considering the browsing context. This flaw could allow notifications to appear across different browsing sessions, including between normal and private browsing modes. The issue does not affect Firefox on other operating systems. Mozilla fixed this vulnerability in Firefox 109.

Impact

The vulnerability allows notification permissions granted in one browsing context to persist and be used in another, such as notifications appearing in private browsing sessions after being granted in normal browsing. This could lead to privacy concerns due to unintended notification display across browsing modes. The impact is considered moderate.

Summary

The vulnerability CVE-2023-23600 affects Firefox for Android versions before 109. It involves improper storage of per-origin notification permissions that failed to account for the browsing context (normal vs private). As a result, notifications granted permission in one browsing context could be displayed in another, potentially leaking notification permissions across sessions. This issue was resolved in Firefox 109.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 25 Oct 2026, 21:28 UTC

Technical details

References

Community reviews

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