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Fencer Vulns
critical 9.3

CVE-2006-0884 json

The WYSIWYG rendering engine ("rich mail" editor) in Mozilla Thunderbird 1.0.7 and earlier allows user-assisted attackers to bypass javascr…

published 2006-02-24 20 y ago modified 2026-06-16 4 mo ago also EUVD-2006-0888

cvss
9.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
7.2%
EPSS 7.2% chance of exploitation in 30 days, percentile 94%
public exploits
1
Exploit-DB

Summary

The WYSIWYG rendering engine ("rich mail" editor) in Mozilla Thunderbird 1.0.7 and earlier allows user-assisted attackers to bypass javascript security settings and obtain sensitive information or cause a crash via an e-mail containing a javascript URI in the SRC attribute of an IFRAME tag, which is executed when the user edits the e-mail.

Patch / fix

  • thunderbird Debian 14, Debian 13, Debian 12 1.5.0.2-1

debian advisories DEBIAN-CVE-2006-0884

  • thunderbird RHEL 4 1.0.8-1.4.1
  • devhelp RHEL 4 0.9.2-2.4.8

red hat advisories RHSA-2006:0330RHSA-2006:0329

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2006-0884 updated

security flaw

  • Red Hat Enterprise Linux AS version 4 devhelp 0.9.2-2.4.8, thunderbird 1.0.8-1.4.1 Red Hat Enterprise Linux Desktop version 4 devhelp 0.9.2-2.4.8, thunderbird 1.0.8-1.4.1 Red Hat Enterprise Linux ES version 4 devhelp 0.9.2-2.4.8, thunderbird 1.0.8-1.4.1 Red Hat Enterprise Linux WS version 4 devhelp 0.9.2-2.4.8, thunderbird 1.0.8-1.4.1
    fixed: vendor fix RHSA-2006:0329

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. First public exploit (EDB-27257)
  2. Published

Exploit prediction

7.23% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-27257 Mozilla (Multiple Products) - iFrame JavaScript Execution dos, 2006-02-22
  • securityfocus.com http://www.securityfocus.com/bid/16770 referenced PoC, tagged "exploit" by a source, unverified
  • securitytracker.com http://securitytracker.com/id?1015665 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 9.3 AV:N/AC:M/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.