CVE-2025-5267Network attack vector

Saved payment-card disclosure via clickjacking

Published May 27, 2025 · Updated Apr 13, 2026

Clickjacking in Mozilla Firefox and Thunderbird before 139, including ESR before 128.11, allows remote attackers to expose saved card details. Mozilla has not published the exact Form Autofill locus or faulty operation that permits deceptive content to capture an autofill interaction. Exploitation requires interaction with a malicious page; Thunderbird email reading disables scripting, so its exposure is limited to browser or browser-like contexts.

CVSS severity5.4
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Clickjacking in Mozilla Firefox and Thunderbird before 139, including ESR before 128.11, allows remote attackers to expose saved card details. Mozilla has not published the exact Form Autofill locus or faulty operation that permits deceptive content to capture an autofill interaction. Exploitation requires interaction with a malicious page; Thunderbird email reading disables scripting, so its exposure is limited to browser or browser-like contexts.

The record

CVE
CVE-2025-5267
Published
May 27, 2025
Updated
Apr 13, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-1021
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 27, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.4CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-1021Improper Restriction of Rendered UI Layers or Frames

Public exploit references

No public exploit references are available in this record.

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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