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CVE-2012-3976· NVD / CVE Program· CNA mitre

Mozilla Firefox before 15.0, Firefox ESR 10.x before 10.0.7, and SeaMonkey before 2.12 do not properly handle onLocationChange events during

Mozilla Firefox before 15.0, Firefox ESR 10.x before 10.0.7, and SeaMonkey before 2.12 do not properly handle onLocationChange events during navigation between different https sites, which allows remote attackers to spoof the X.509 certificate information in the address bar via a crafted web page.

MediumCVSS 4.3 · v2.0—No exploit No fix recorded
Published
Aug 29, 2012
Updated
Jun 16, 2026
EPSS
1.8% · 77th percentile
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Report tools

JSON

Action score

18

Monitor

Low priority for now.

CVSS
17 / 40 · 4.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 1.8%

Noroxi analysis

No Noroxi analysis for this record yet

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Affected systems

VendorProduct
mozillafirefox
mozillaseamonkey
opensuseopensuse
suselinux enterprise desktop
suselinux enterprise server
suselinux enterprise software development kit
redhatenterprise linux desktop
redhatenterprise linux eus
redhatenterprise linux server
redhatenterprise linux server eus
redhatenterprise linux workstation
canonicalubuntu linux

Affected versions

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

  • canonical ubuntu linux10.04
  • canonical ubuntu linux11.04
  • canonical ubuntu linux11.10
  • canonical ubuntu linux12.04
  • mozilla firefoxbefore 15.0
  • mozilla firefox10.0 and later · before 10.0.7
  • mozilla seamonkeybefore 2.12
  • opensuse opensuse12.2
  • redhat enterprise linux desktop5.0
  • redhat enterprise linux desktop6.0
  • redhat enterprise linux eus6.3
  • redhat enterprise linux server5.0
  • redhat enterprise linux server6.0
  • redhat enterprise linux server eus6.3
  • redhat enterprise linux workstation5.0
  • redhat enterprise linux workstation6.0
  • suse linux enterprise desktop10
  • suse linux enterprise desktop11
  • suse linux enterprise server10
  • suse linux enterprise server11

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 befKEV
    94Now
  • CVE-2019-11708Insufficient vetting of parameters passed with the Prompt:Open IPC message between child and parent processes can result in the non-sandboxeKEV
    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 bypassKEV
    86Now
  • CVE-2013-1690Mozilla Firefox before 22.0, Firefox ESR 17.x before 17.0.7, Thunderbird before 17.0.7, and Thunderbird ESR 17.x before 17.0.7 do not properKEV
    86Now
  • CVE-2019-17026Incorrect alias information in IonMonkey JIT compiler for setting array elements could lead to a type confusion.KEV
    79This week
  • CVE-2024-9680An attacker was able to achieve code execution in the content process by exploiting a use-after-free in Animation timelines.KEV
    76This week

Remediation

Which version to upgrade to

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

No fix version is recorded for this entry. Check the references for vendor advisories.

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.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

    If successful

    Confidentiality
    P · data can be read
    Integrity
    none
    Availability
    none
    Attack complexity
    M
    Confidentiality impact
    P
    Integrity impact
    None
    Availability impact
    None

    Weakness class (CWE)

    CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor

    CVSS vector

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

    nvd-primary

    Root cause

    The extension requests broader permissions than its function needs and sends the data it collects out for purposes beyond its stated function.

    The bug in code

    The whole CWE-200 class

    A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

    Vulnerable

    json
    {  "permissions": ["tabs", "<all_urls>"],  "background": { "service_worker": "analytics.js" }}

    Fixed

    json
    {  "permissions": ["activeTab"],  "host_permissions": ["https://yildiz.example/*"]}

    Attack context

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

    Change log

    No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

    References

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

    All records