KEV Intelligence

Vulnerability report

Exploited in the wild High confidence Not in CISA KEV

CVE-2009-1308

Firefox Cross-Site Scripting

Mozilla / Firefox

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Severity
CVSS 4.3 · Medium
Confidence
High
Exploit status
Exploited in the wild
EPSS
2.3%
First observed
—
Last observed
—

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2009-1308 is an unauthenticated vulnerability affecting Mozilla Firefox and 2 other products. Cross-site scripting (XSS) vulnerability in Mozilla Firefox before 3.0.9, Thunderbird, and SeaMonkey allows remote...

Is it exploited?

Yes. KEV Intelligence tracks this CVE as a known exploited vulnerability. Confidence is high.

Who is affected?

Mozilla / Firefox.

What should we do?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Overview

Firefox Cross-Site Scripting

Cross-site scripting (XSS) vulnerability in Mozilla Firefox before 3.0.9, Thunderbird, and SeaMonkey allows remote attackers to inject arbitrary web script or HTML via vectors involving XBL JavaScript bindings and remote stylesheets, as exploited in the wild by a March 2009 eBay listing.

View vendor advisory (opens in new tab)
Published
22 Apr 2009
Exploitation Reported
22 Apr 2009
Attack vector
Remote
Complexity
—
Privileges
None
User interaction
—

Tags

java

CVE References

  • CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2009-1308
  • MDVSA-2009:111 mandriva.com · Vendor Advisory http://www.mandriva.com/security/advisories?name=MDVSA-2009:111
  • FEDORA-2009-3875 redhat.com · Vendor Advisory https://www.redhat.com/archives/fedora-package-announce/2009-April/ms...
  • USN-782-1 ubuntu.com · Vendor Advisory http://www.ubuntu.com/usn/usn-782-1
  • USN-764-1 usn.ubuntu.com · Vendor Advisory https://usn.ubuntu.com/764-1/
  • MDVSA-2009:141 mandriva.com · Vendor Advisory http://www.mandriva.com/security/advisories?name=MDVSA-2009:141
  • SUSE-SR:2009:010 lists.opensuse.org · Vendor Advisory http://lists.opensuse.org/opensuse-security-announce/2009-05/msg00000...
  • DSA-1797 debian.org · Vendor Advisory http://www.debian.org/security/2009/dsa-1797
  • RHSA-2009:0436 redhat.com · Vendor Advisory http://www.redhat.com/support/errata/RHSA-2009-0436.html
  • RHSA-2009:1126 redhat.com · Vendor Advisory http://www.redhat.com/support/errata/RHSA-2009-1126.html
  • 264308 sunsolve.sun.com · Vendor Advisory http://sunsolve.sun.com/search/document.do?assetkey=1-66-264308-1
  • 34894 secunia.com · Third-Party Advisory http://secunia.com/advisories/34894
  • 34758 secunia.com · Third-Party Advisory http://secunia.com/advisories/34758
  • 35536 secunia.com · Third-Party Advisory http://secunia.com/advisories/35536
  • 35065 secunia.com · Third-Party Advisory http://secunia.com/advisories/35065
  • 35042 secunia.com · Third-Party Advisory http://secunia.com/advisories/35042
  • 34843 secunia.com · Third-Party Advisory http://secunia.com/advisories/34843
  • 34780 secunia.com · Third-Party Advisory http://secunia.com/advisories/34780
  • ADV-2009-1125 vupen.com · VDB Entry http://www.vupen.com/english/advisories/2009/1125
  • oval:org.mitre.oval:def:6185 oval.cisecurity.org · VDB Entry https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.m...
  • oval:org.mitre.oval:def:7285 oval.cisecurity.org · VDB Entry https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.m...
  • oval:org.mitre.oval:def:6173 oval.cisecurity.org · VDB Entry https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.m...
  • oval:org.mitre.oval:def:10428 oval.cisecurity.org · VDB Entry https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.m...
  • 34656 securityfocus.com · VDB Entry http://www.securityfocus.com/bid/34656
  • oval:org.mitre.oval:def:6296 oval.cisecurity.org · VDB Entry https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.m...
  • 1022097 securitytracker.com · VDB Entry http://www.securitytracker.com/id?1022097
  • bugzilla.mozilla.org/show_bug.cgi bugzilla.mozilla.org · CVE Record https://bugzilla.mozilla.org/show_bug.cgi?id=481558
  • mozilla.org/security/announce/2009/mfsa2009-18.html mozilla.org · CVE Record http://www.mozilla.org/security/announce/2009/mfsa2009-18.html
  • theregister.co.uk/2009/03/08/ebay_scam_wizardy theregister.co.uk · CVE Record http://www.theregister.co.uk/2009/03/08/ebay_scam_wizardy/

Exploitation evidence

Why KEV Intelligence marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

CVE

Recorded 22 Apr 2009

Independent exploitation attestation added to the KEV Intelligence record.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the KEV Intelligence Pro API.

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Source Added
CVE First 2009-04-22 18:00 UTC

Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets
0
User-Agents
0

Raw values available in Pro and Enterprise.

Scanner coverage

No scanner integrations recorded yet.

Virtual patch status

No KEV Intelligence virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

No detection artifacts or sensor request patterns are available for this CVE yet.

Check back as sensor telemetry and scanner integrations are updated.

Risk and context

Severity, weaknesses, and research context

CVSS v2.0

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

EPSS

2.3%

Weaknesses

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') CWE-79

Timeline

From disclosure to observed exploitation

  1. Added to KEV Intelligence KEV Feed

    High-confidence, third-party attested exploitation

  2. CVE published

    Vulnerability disclosed publicly

  3. CVE ID reserved

    Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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  • Evidence confidence and provenance
  • First-party sensor telemetry
  • PoC and scanner references
  • Affected versions and enrichment
  • Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2009-1308

Free JSON includes basic KEV fields 
{
  "cve_id": "CVE-2009-1308",
  "confidence": "High",
  "cvss_score": 4.3,
  "cvss_estimated": false,
  "epss_score": 0.02288,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}

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