VulnSocial

CVE-2025-3875Patch(mozilla / thunderbird)

LOWCVSS 7.5 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch mozilla thunderbird systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Thunderbird parses addresses in a way that can allow sender spoofing in case the server allows an invalid From address to be used. For example, if the From header contains an (invalid) value "Spoofed Name ", Thunderbird treats [email protected] as the actual address. This vulnerability was fixed in Thunderbird 128.10.1 and Thunderbird 138.0.1.

mozilla CVEsBack to dashboard
0.5/ 10 priority

Sources & remediation

Vendor / third-party advisories
Other references
Weakness type (CWE)
CWE-290

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • thunderbird

Threat summary

  • Patch or workaround signal is available
  • 1 mentions across 1 observed day

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 1 signal
  • 1 total mentions across 1 day

Affected systems

Vendors
mozilla
Products
thunderbird

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-04-14: 1Patch / Workaround · 2026-04-14: 1Technical Details · 2026-04-14: 104-14
Signal classification1 categories
Patch
1100.0%
Full discourse1 post
  • Giuseppe Paternicola@giuseppe_1337
    Patch

    🚨 HIGH SEVERITY: CVE-2025-3875 (CVSS 7.5) Thunderbird email spoofing flaw allows attackers to impersonate senders via malformed From headers. Affects versions <128.10.1 & <138.0.1. Patch immediately. #CVE #Vulnerability #PatchNow #ThreatIntel https://t.co/FQqYcon434

    Post summary

    Mozilla reports a high‑severity email spoofing vulnerability (CVE‑2025‑3875) affecting Thunderbird versions below 128.10.1 and 138.0.1, and recommends applying the available patch immediately.

    00000164
    25 followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appmozillathunderbird---

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