CVE-2022-45414Network attack vector

Information disclosure via quoted remote-content attributes

Published Dec 22, 2022 · Updated Apr 15, 2025

Remote-content bypass in Mozilla Thunderbird before 102.5.1 allows remote attackers to trigger network requests through crafted HTML email. When a user quotes the message, VIDEO POSTER and OBJECT DATA attributes are fetched even when remote content is blocked, and POSTER images appear in the composer. Exploitation requires the recipient to reply or otherwise quote the email, exposing request information and potentially enabling additional actions on releases lacking the earlier related protection.

CVSS severity8.8
High
EPSS probability0.53%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Remote-content bypass in Mozilla Thunderbird before 102.5.1 allows remote attackers to trigger network requests through crafted HTML email. When a user quotes the message, VIDEO POSTER and OBJECT DATA attributes are fetched even when remote content is blocked, and POSTER images appear in the composer. Exploitation requires the recipient to reply or otherwise quote the email, exposing request information and potentially enabling additional actions on releases lacking the earlier related protection.

The record

CVE
CVE-2022-45414
Published
Dec 22, 2022
Updated
Apr 15, 2025
Vendor
Mozilla
Product
Thunderbird
Classifications
CWE-200, T1204
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 <102.5.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mozilla · Thunderbirdversion=unspecified <102.5.1

Published CVSS scores

8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
8.8NISTCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/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-200Exposure of Sensitive Information to an Unauthorized Actor
T1204User Execution

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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