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NVD / CVE Program· CNA mitre

CVE-2011-2999: Mozilla Firefox before 3.6.23 and 4.x through 5, Thunderbird before 6.0, and SeaMonkey before 2.3 do not properly handle "location" as the…

MediumCVSS 4.3 · v2.0—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 17/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 1% (FIRST EPSS); higher than 66% of all records.
  • Fixed version: xulrunner (Debian:5.0) 1.9.0.19-14; iceape (Debian:6.0) 2.0.11-8; icedove (Debian:6.0) 3.0.11-1+squeeze5.

Low priority for now. Upgrade to xulrunner (Debian:5.0) 1.9.0.19-14; iceape (Debian:6.0) 2.0.11-8; icedove (Debian:6.0) 3.0.11-1+squeeze5 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Mozilla Firefox before 3.6.23 and 4.x through 5, Thunderbird before 6.0, and SeaMonkey before 2.3 do not properly handle "location" as the name of a frame, which allows remote attackers to bypass the Same Origin Policy via a crafted web site, a different vulnerability than CVE-2010-0170.

Published
Sep 28, 2011
Updated
Jun 16, 2026
EPSS
1.0% · 66th percentile

Report tools

JSON

Action score

17

Monitor

Low priority for now.

CVSS
17 / 40 · 4.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.0%

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  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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When you'll hear from us

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  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
mozillafirefox
mozillathunderbird
mozillaseamonkey

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • mozilla firefoxup to 3.6.22 inclusive
  • mozilla firefox3.6
  • mozilla firefox3.6.10
  • mozilla firefox3.6.11
  • mozilla firefox3.6.12
  • mozilla firefox3.6.13
  • mozilla firefox3.6.14
  • mozilla firefox3.6.15
+12 more rows
  • mozilla firefox3.6.16
  • mozilla firefox3.6.17
  • mozilla firefox3.6.18
  • mozilla firefox3.6.19
  • mozilla firefox3.6.2
  • mozilla firefox3.6.20
  • mozilla firefox3.6.21
  • mozilla firefox3.6.3
  • mozilla firefox3.6.4
  • mozilla firefox3.6.6
  • mozilla firefox3.6.7
  • mozilla firefox3.6.8

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:5.0xulrunnerbefore 1.9.0.19-141.9.0.19-14
Debian:6.0iceapebefore 2.0.11-82.0.11-8
Debian:6.0icedovebefore 3.0.11-1+squeeze53.0.11-1+squeeze5
Debian:6.0iceweaselbefore 3.5.16-103.5.16-10
Red Hat:enterprise_linux:4::asfirefoxbefore 0:3.6.23-1.el40:3.6.23-1.el4
Red Hat:enterprise_linux:4::asfirefox-debuginfobefore 0:3.6.23-1.el40:3.6.23-1.el4
Red Hat:enterprise_linux:4::asseamonkeybefore 0:1.0.9-76.el40:1.0.9-76.el4
Red Hat:enterprise_linux:4::asseamonkey-chatbefore 0:1.0.9-76.el40:1.0.9-76.el4
Red Hat:enterprise_linux:4::asseamonkey-debuginfobefore 0:1.0.9-76.el40:1.0.9-76.el4
Red Hat:enterprise_linux:4::asseamonkey-develbefore 0:1.0.9-76.el40:1.0.9-76.el4
Red Hat:enterprise_linux:4::asseamonkey-dom-inspectorbefore 0:1.0.9-76.el40:1.0.9-76.el4
Red Hat:enterprise_linux:4::asseamonkey-js-debuggerbefore 0:1.0.9-76.el40:1.0.9-76.el4
Red Hat:enterprise_linux:4::asseamonkey-mailbefore 0:1.0.9-76.el40:1.0.9-76.el4
Red Hat:enterprise_linux:4::asthunderbirdbefore 0:1.5.0.12-44.el40:1.5.0.12-44.el4
Red Hat:enterprise_linux:4::asthunderbird-debuginfobefore 0:1.5.0.12-44.el40:1.5.0.12-44.el4
Red Hat:enterprise_linux:5::clientfirefoxbefore 0:3.6.23-2.el5_70:3.6.23-2.el5_7
Red Hat:enterprise_linux:5::clientfirefox-debuginfobefore 0:3.6.23-2.el5_70:3.6.23-2.el5_7
Red Hat:enterprise_linux:5::clientthunderbirdbefore 0:2.0.0.24-26.el5_70:2.0.0.24-26.el5_7
Red Hat:enterprise_linux:5::clientthunderbird-debuginfobefore 0:2.0.0.24-26.el5_70:2.0.0.24-26.el5_7
Red Hat:enterprise_linux:5::clientxulrunnerbefore 0:1.9.2.23-1.el5_70:1.9.2.23-1.el5_7
Red Hat:enterprise_linux:5::clientxulrunner-debuginfobefore 0:1.9.2.23-1.el5_70:1.9.2.23-1.el5_7
Red Hat:enterprise_linux:5::client_workstationxulrunner-develbefore 0:1.9.2.23-1.el5_70:1.9.2.23-1.el5_7
Red Hat:enterprise_linux:6::serverfirefoxbefore 0:3.6.23-2.el6_10:3.6.23-2.el6_1
Red Hat:enterprise_linux:6::serverfirefox-debuginfobefore 0:3.6.23-2.el6_10:3.6.23-2.el6_1

+5

Same product

mozilla: all records

Other highest-scoring records for the same primary product.

  • CVE-2010-3765Mozilla Firefox 3.5.x through 3.5.14 and 3.6.x through 3.6.11, Thunderbird 3.1.6 before 3.1.6 and 3.0.x before 3.0.10, and SeaMonkey 2.x…KEV
    94Now
  • CVE-2019-11708Insufficient vetting of parameters passed with the Prompt:Open IPC message between child and parent processes can result in the…KEV
    87Now
  • CVE-2015-4495The PDF reader in Mozilla Firefox before 39.0.3, Firefox ESR 38.x before 38.1.1, and Firefox OS before 2.2 allows remote attackers to…KEV
    86Now

Published before and after this one in the same product

  • ← EarlierCVE-2011-2996Sep 28, 2011 · Unspecified vulnerability in the plugin API in Mozilla Firefox 3.6.x before 3.6.23 allows remote attackers to cause a denial of service…
    41Plan
  • ← EarlierCVE-2011-2997Sep 28, 2011 · Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox 6, Thunderbird before 7.0, and SeaMonkey before 2.4 allow…
    42Plan
  • Later →CVE-2011-3000Sep 28, 2011 · Mozilla Firefox before 3.6.23 and 4.x through 6, Thunderbird before 7.0, and SeaMonkey before 2.4 do not properly handle HTTP responses…
    18Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:iceape2.0.11-8 · Debian:6.0Package registry (OSV)
debian:icedove3.0.11-1+squeeze5 · Debian:6.0Package registry (OSV)
debian:iceweasel3.5.16-10 · Debian:6.0Package registry (OSV)
debian:xulrunner1.9.0.19-14 · Debian:5.0Package registry (OSV)
red hat:firefox0:3.6.23-1.el4 · Red Hat:enterprise_linux:4::asPackage registry (OSV)
red hat:firefox-debuginfo0:3.6.23-1.el4 · Red Hat:enterprise_linux:4::asPackage registry (OSV)
red hat:seamonkey0:1.0.9-76.el4 · Red Hat:enterprise_linux:4::asPackage registry (OSV)
red hat:seamonkey-chat0:1.0.9-76.el4 · Red Hat:enterprise_linux:4::asPackage registry (OSV)
red hat:seamonkey-debuginfo0:1.0.9-76.el4 · Red Hat:enterprise_linux:4::asPackage registry (OSV)
red hat:seamonkey-devel0:1.0.9-76.el4 · Red Hat:enterprise_linux:4::asPackage registry (OSV)
red hat:seamonkey-dom-inspector0:1.0.9-76.el4 · Red Hat:enterprise_linux:4::asPackage registry (OSV)
red hat:thunderbird0:3.1.15-1.el6_1 · Red Hat:enterprise_linux:6::serverPackage registry (OSV)
red hat:thunderbird-debuginfo0:3.1.15-1.el6_1 · Red Hat:enterprise_linux:6::serverPackage registry (OSV)
red hat:xulrunner0:1.9.2.23-1.el5_7 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:xulrunner-debuginfo0:1.9.2.23-1.el5_7 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:xulrunner-devel0:1.9.2.23-1.el5_7 · Red Hat:enterprise_linux:5::client_workstationPackage registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

    If successful

    Confidentiality
    none
    Integrity
    P · data or configuration can be modified
    Availability
    none
    Attack complexity
    M
    Confidentiality impact
    None
    Integrity impact
    P
    Availability impact
    None

    Weakness class (CWE)

    CWE-264 · Permissions, Privileges, and Access Controls

    CVSS vector

    AV:N/AC:M/Au:N/C:N/I:P/A:N

    nvd-primary

    Attack context

    MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

    MITRE has no CAPEC/ATT&CK mapping for this CWE.

    References

    Show all references (12 more)

    Vendor advisories and official records. Exploit/PoC links are deliberately left out.

    All records