CVE-2022-45413Public exploitNetwork attack vector

Cross-site cookie transmission via intent fallback URL

Published Dec 22, 2022 · Updated Apr 15, 2025

SameSite cookie bypass in Mozilla Firefox for Android before 107 allows remote attackers to trigger Strict cookie transmission via intent URLs. The App Links interceptor loads S.browser_fallback_url from an invalid Android intent without marking the navigation as external, so Gecko attaches Strict cookies. A user must visit an attacker-controlled page; the result is a cookie-bearing cross-site request, not direct disclosure of cookie values.

CVSS severity6.1
Medium
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SameSite cookie bypass in Mozilla Firefox for Android before 107 allows remote attackers to trigger Strict cookie transmission via intent URLs. The App Links interceptor loads S.browser_fallback_url from an invalid Android intent without marking the navigation as external, so Gecko attaches Strict cookies. A user must visit an attacker-controlled page; the result is a cookie-bearing cross-site request, not direct disclosure of cookie values.

The record

CVE
CVE-2022-45413
Published
Dec 22, 2022
Updated
Apr 15, 2025
Vendor
Mozilla
Product
Firefox
Classifications
Unavailable
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 22, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 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 <107

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mozilla · Firefoxversion=unspecified <107

Published CVSS scores

6.1NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/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

No sourced classifications are available.

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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