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CVE-2025-14327 is a spoofing vulnerability in the Downloads Panel component of Mozilla Firefox and Mozilla Thunderbird. The issue allows misleading or deceptive download-related user interface content or state to be presented to the user within the Downloads Panel, creating a trust-boundary failure between attacker-controlled content and browser chrome. The flaw was fixed in Firefox 146, Thunderbird 146, Firefox ESR 140.7, and Thunderbird 140.7.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
19 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A spoofing vulnerability in the Downloads Panel component of Mozilla products, potentially allowing attackers to mislead users.
A spoofing vulnerability in the Downloads Panel component of Firefox, which could allow an attacker to mislead users about the origin or nature of downloaded files.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.