Vulnerability report

Exploited in the wild High confidence Not in CISA KEV

CVE-2013-5331

Flash Player

Adobe / Flash Player

Watch CVE-2013-5331 Browse KEV feed
Severity
CVSS 9.3 · High
Confidence
High
Exploit status
Exploited in the wild
EPSS
72.5%
First observed
—
Last observed
—

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2013-5331 is an unauthenticated vulnerability affecting Adobe Flash Player. Adobe Flash Player before 11.7.700.257 and 11.8.x and 11.9.x before 11.9.900.170 on Windows and Mac OS X and before 11.2.202.332 on...

Is it exploited?

Yes. Previdian tracks this CVE as a known exploited vulnerability. Confidence is high. Also confirmed by third-party sources.

Who is affected?

Adobe / Flash Player.

What should we do?

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

Overview

Flash Player

Adobe Flash Player before 11.7.700.257 and 11.8.x and 11.9.x before 11.9.900.170 on Windows and Mac OS X and before 11.2.202.332 on Linux, Adobe AIR before 3.9.0.1380, Adobe AIR SDK before 3.9.0.1380, and Adobe AIR SDK & Compiler before 3.9.0.1380 allow remote attackers to execute arbitrary code via crafted .swf content that leverages an unspecified "type confusion," as exploited in the wild in December 2013.

View vendor advisory (opens in new tab)
Published
11 Dec 2013
Exploitation Reported
11 Dec 2013
Attack vector
Remote
Complexity
—
Privileges
None
User interaction
—

Tags

linux metasploit macos windows

CVE References

Exploitation evidence

Why Previdian 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 11 Dec 2013

A trusted third party reported exploitation.

Proof of concept available

Recorded 28 Apr 2025

Public scanner or PoC coverage increases practical exploitability.

Known exploited vulnerability sources

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

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Source Added
CVE First 2013-12-11 15:00 UTC

Detection

Operational artifacts and observed signals

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

Observed signals

Request targets
User-Agents
Callback hosts
0
0
0

Request targets and User-Agents available in Pro. Callback host details available in Enterprise.

Virtual patch status

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

Learn about virtual patches →

Scanner Artifacts

Scanner and exploit-framework references linked to this CVE.

Scanner Reference Detected
Metasploit https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/browser/adobe_flash_filters_type_confusion.rb 28 Apr 2025

Risk and context

Severity, weaknesses, and research context

CVSS v2.0

9.3 High

Potential damage if exploited. Separate from whether attackers are using it.

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

EPSS

72.5%

Estimated chance of exploitation in the next 30 days. Previdian's warning comes from evidence, not this score.

Weaknesses

Improper Control of Generation of Code ('Code Injection') CWE-94

Potential Proof of Concepts

These PoCs are unverified and could contain malware. Use at your own risk.

adobe_flash_filters_type_confusion

metasploit · Created Unknown

Metasploit module for CVE-2013-5331

Timeline

From disclosure to observed exploitation

  1. 15:02 UTC

    Metasploit module available

    Exploit module available

  2. 15:02 UTC

    Public PoC available

    Public proof-of-concept code published

  3. 15:00 UTC

    Added to Previdian KEV Feed

    High-confidence, third-party attested exploitation

  4. 15:00 UTC

    CVE published

    Vulnerability disclosed publicly

  5. 00:00 UTC

    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-2013-5331

Free JSON includes basic KEV fields 
{
  "cve_id": "CVE-2013-5331",
  "confidence": "High",
  "cvss_score": 9.3,
  "cvss_estimated": false,
  "epss_score": 0.72495,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}