CVE-2025-3035Public exploitNetwork attack vector

Cross-tab title disclosure via stale shortcut listener

Published Apr 1, 2025 · Updated Apr 13, 2026

Information disclosure in Mozilla Firefox before 137 allows context-dependent attackers to send a prior tab's title to an AI provider. The shared AI Chat Shortcuts element retains its first tab's mouseover listener and browser reference, so later shortcut use builds the prompt from stale tab state. The opt-in chatbot must be enabled, and a user must invoke title-bearing shortcuts in two tabs; only the earlier document title is disclosed.

CVSS severity5.3
Medium
EPSS probability0.29%
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 137 allows context-dependent attackers to send a prior tab's title to an AI provider. The shared AI Chat Shortcuts element retains its first tab's mouseover listener and browser reference, so later shortcut use builds the prompt from stale tab state. The opt-in chatbot must be enabled, and a user must invoke title-bearing shortcuts in two tabs; only the earlier document title is disclosed.

The record

CVE
CVE-2025-3035
Published
Apr 1, 2025
Updated
Apr 13, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-359
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 1, 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

5.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/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-359Exposure of Private Personal Information to an Unauthorized Actor

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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