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CVE-2025-3875VulnerabilityPublished Updated

Red Hat Security Advisory: thunderbird security update

Affects Red HatSource GCVE Database

0

Mentioned vulnerabilities

Not known to be exploited.

Data as of 25 Oct 2026, 19:02 UTC

Severity
High

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS
0.3% chance of exploitation in 30 days – higher than 33% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 4 Jun 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.

What to do

AI-suggested

Red Hat has released an updated Thunderbird package (version 128.10.1-1.el8_4) that addresses these vulnerabilities. Users and administrators should apply this security update promptly. For detailed update instructions, refer to Red Hat's official advisory at https://access.redhat.com/articles/11258. No additional mitigation steps are specified by the vendor.

Description

Multiple security vulnerabilities have been identified in Mozilla Thunderbird as packaged for Red Hat Enterprise Linux 8.4. These include JavaScript execution via spoofed PDF attachments, sender spoofing through malformed From headers, unsolicited file downloads leading to disk space exhaustion and credential leakage, and tracking links bypassing remote content blocking. Red Hat has issued an important security update addressing these issues.

References

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