CVE-2023-25750Public exploitNetwork attack vector

Private-browsing data disclosure via permitted CacheStorage writes

Published Jun 2, 2023 · Updated Jan 9, 2025

Information disclosure in Mozilla Firefox before 111 allows remote attackers to expose private-browsing cache data via web content. CacheStorage.cpp permits partitioned third-party storage in private browsing, so caches.open() writes an origin entry under storage/default and retains cached data across private sessions. The attack requires a private-browsing user to load attacker-controlled content; cached state can remain available across later private sessions.

CVSS severity4.3
Medium
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Mozilla Firefox before 111 allows remote attackers to expose private-browsing cache data via web content. CacheStorage.cpp permits partitioned third-party storage in private browsing, so caches.open() writes an origin entry under storage/default and retains cached data across private sessions. The attack requires a private-browsing user to load attacker-controlled content; cached state can remain available across later private sessions.

The record

CVE
CVE-2023-25750
Published
Jun 2, 2023
Updated
Jan 9, 2025
Vendor
Mozilla
Product
Firefox
Classifications
CWE-22, CWE-668
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 2, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 9, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <111

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mozilla · Firefoxversion=unspecified <111

Published CVSS scores

4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
4.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-668Exposure of Resource to Wrong Sphere

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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