An attacker who can send HTML chat messages (via Matrix or XMPP) can inject arbitrary styled content, phishing links, and CSS that manipulates the chat UI. This vulnerability was fixed in Thunderbird 152.0.1 and Thunderbird 140.12.1.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Thunderbird | affected |
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Project Subscriptions
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Advisories
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Fixes
Solution
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Workaround
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References
History
Wed, 01 Jul 2026 01:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | An attacker who can send HTML chat messages (via Matrix or XMPP) can inject arbitrary styled content, phishing links, and CSS that manipulates the chat UI. This vulnerability was fixed in Thunderbird 152.0.1 and Thunderbird 140.12.1. | |
| Title | Chat UI manipulation by injection | |
| References |
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Projects
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MITRE
Status: PUBLISHED
Assigner: mozilla
Published:
Updated: 2026-07-01T00:58:33.922Z
Reserved: 2026-06-26T15:27:32.832Z
Link: CVE-2026-57963
Vulnrichment
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NVD
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Redhat
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OpenCVE Enrichment
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Weaknesses
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