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Fencer Vulns
medium 4.3

CVE-2008-2800 json

Mozilla Firefox before 2.0.0.15 and SeaMonkey before 1.1.10 allow remote attackers to bypass the Same Origin Policy and conduct cross-site…

published 2008-07-07 18 y ago modified 2026-06-16 4 mo ago also EUVD-2008-2793

cvss
4.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.0%
EPSS 2.0% chance of exploitation in 30 days, percentile 80%
public exploits
0
none known

Summary

Mozilla Firefox before 2.0.0.15 and SeaMonkey before 1.1.10 allow remote attackers to bypass the Same Origin Policy and conduct cross-site scripting (XSS) attacks via vectors involving (1) an event handler attached to an outer window, (2) a SCRIPT element in an unloaded document, or (3) the onreadystatechange handler in conjunction with an XMLHttpRequest.

Patch / fix

  • thunderbird RHEL 4 1.5.0.12-14.el4
  • thunderbird RHEL 5 PRODUCTIVITY, RHEL 5 2.0.0.16-1.el5
  • firefox RHEL 5 3.0-2.el5
  • yelp RHEL 5 2.16.0-19.el5
  • devhelp RHEL 5 0.12-17.el5
  • xulrunner RHEL 5 1.9-1.el5
  • xulrunner-devel-unstable RHEL 5 1.9-1.el5
  • firefox RHEL 4 1.5.0.12-0.19.el4

red hat advisories RHSA-2008:0616RHSA-2008:0569RHSA-2008:0549RHSA-2008:0547

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-2008-2800 updated

Firefox XSS attacks

  • Red Hat Desktop version 3 seamonkey 1.0.9-0.20.el3, seamonkey-nss 1.0.9-0.20.el3, seamonkey-chat 1.0.9-0.20.el3, seamonkey-mail 1.0.9-0.20.el3, seamonkey-nspr 1.0.9-0.20.el3, seamonkey-js-debugger 1.0.9-0.20.el3, +1 more
    fixed: vendor fix RHSA-2008:0547
  • Red Hat Enterprise Linux (v. 5 server) firefox 3.0-2.el5, yelp 2.16.0-19.el5, devhelp 0.12-17.el5, xulrunner 1.9-1.el5, xulrunner-devel-unstable 1.9-1.el5
    fixed: vendor fix RHSA-2008:0569
  • Red Hat Enterprise Linux AS (Advanced Server) version 2.1 seamonkey 1.0.9-0.17.el2, seamonkey-nss 1.0.9-0.17.el2, seamonkey-chat 1.0.9-0.17.el2, seamonkey-mail 1.0.9-0.17.el2, seamonkey-nspr 1.0.9-0.17.el2, seamonkey-js-debugger 1.0.9-0.17.el2, +1 more Red Hat Enterprise Linux AS version 3 seamonkey 1.0.9-0.20.el3, seamonkey-nss 1.0.9-0.20.el3, seamonkey-chat 1.0.9-0.20.el3, seamonkey-mail 1.0.9-0.20.el3, seamonkey-nspr 1.0.9-0.20.el3, seamonkey-js-debugger 1.0.9-0.20.el3, +1 more Red Hat Enterprise Linux AS version 4 firefox 1.5.0.12-0.19.el4, seamonkey 1.0.9-16.3.el4_6, thunderbird 1.5.0.12-14.el4, seamonkey-chat 1.0.9-16.3.el4_6, seamonkey-mail 1.0.9-16.3.el4_6, seamonkey-js-debugger 1.0.9-16.3.el4_6, +1 more
    fixed: vendor fix RHSA-2008:0547
  • Red Hat Enterprise Linux Desktop (v. 5 client) firefox 3.0-2.el5, yelp 2.16.0-19.el5, devhelp 0.12-17.el5, xulrunner 1.9-1.el5, thunderbird 2.0.0.16-1.el5, xulrunner-devel-unstable 1.9-1.el5
    fixed: vendor fix RHSA-2008:0616
  • Red Hat Enterprise Linux Desktop version 4 firefox 1.5.0.12-0.19.el4, seamonkey 1.0.9-16.3.el4_6, thunderbird 1.5.0.12-14.el4, seamonkey-chat 1.0.9-16.3.el4_6, seamonkey-mail 1.0.9-16.3.el4_6, seamonkey-js-debugger 1.0.9-16.3.el4_6, +1 more
    fixed: vendor fix RHSA-2008:0547
  • Red Hat Enterprise Linux Desktop Workstation (v. 5 client) devhelp 0.12-17.el5, xulrunner 1.9-1.el5, xulrunner-devel-unstable 1.9-1.el5
    fixed: vendor fix RHSA-2008:0569
  • Red Hat Enterprise Linux ES version 2.1 seamonkey 1.0.9-0.17.el2, seamonkey-nss 1.0.9-0.17.el2, seamonkey-chat 1.0.9-0.17.el2, seamonkey-mail 1.0.9-0.17.el2, seamonkey-nspr 1.0.9-0.17.el2, seamonkey-js-debugger 1.0.9-0.17.el2, +1 more Red Hat Enterprise Linux ES version 3 seamonkey 1.0.9-0.20.el3, seamonkey-nss 1.0.9-0.20.el3, seamonkey-chat 1.0.9-0.20.el3, seamonkey-mail 1.0.9-0.20.el3, seamonkey-nspr 1.0.9-0.20.el3, seamonkey-js-debugger 1.0.9-0.20.el3, +1 more Red Hat Enterprise Linux ES version 4 firefox 1.5.0.12-0.19.el4, seamonkey 1.0.9-16.3.el4_6, thunderbird 1.5.0.12-14.el4, seamonkey-chat 1.0.9-16.3.el4_6, seamonkey-mail 1.0.9-16.3.el4_6, seamonkey-js-debugger 1.0.9-16.3.el4_6, +1 more
    fixed: vendor fix RHSA-2008:0547
  • Red Hat Enterprise Linux Optional Productivity Applications (v. 5 server) thunderbird 2.0.0.16-1.el5
    fixed: vendor fix RHSA-2008:0616
show 1 more
  • Red Hat Enterprise Linux WS version 2.1 seamonkey 1.0.9-0.17.el2, seamonkey-nss 1.0.9-0.17.el2, seamonkey-chat 1.0.9-0.17.el2, seamonkey-mail 1.0.9-0.17.el2, seamonkey-nspr 1.0.9-0.17.el2, seamonkey-js-debugger 1.0.9-0.17.el2, +1 more Red Hat Enterprise Linux WS version 3 seamonkey 1.0.9-0.20.el3, seamonkey-nss 1.0.9-0.20.el3, seamonkey-chat 1.0.9-0.20.el3, seamonkey-mail 1.0.9-0.20.el3, seamonkey-nspr 1.0.9-0.20.el3, seamonkey-js-debugger 1.0.9-0.20.el3, +1 more Red Hat Enterprise Linux WS version 4 firefox 1.5.0.12-0.19.el4, seamonkey 1.0.9-16.3.el4_6, thunderbird 1.5.0.12-14.el4, seamonkey-chat 1.0.9-16.3.el4_6, seamonkey-mail 1.0.9-16.3.el4_6, seamonkey-js-debugger 1.0.9-16.3.el4_6, +1 more Red Hat Linux Advanced Workstation 2.1 seamonkey 1.0.9-0.17.el2, seamonkey-nss 1.0.9-0.17.el2, seamonkey-chat 1.0.9-0.17.el2, seamonkey-mail 1.0.9-0.17.el2, seamonkey-nspr 1.0.9-0.17.el2, seamonkey-js-debugger 1.0.9-0.17.el2, +1 more
    fixed: vendor fix RHSA-2008:0547

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

Exploit prediction

2.00% chance of exploitation in the next 30 days, higher than 80% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

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.