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CVE-2013-4211

84
FAUCET Score

CVE-2013-4211 describes a critical code execution vulnerability in OpenX Ad Server version 2.8.10, stemming from a backdoor within the flowplayer-3.1.1.min.js library. This flaw allows an unauthenticated remote attacker to execute arbitrary PHP code on the affected system. With a CVSS score of 9.8 (Critical), the vulnerability is easily exploitable over the network with low complexity, leading to complete compromise of confidentiality, integrity, and availability. While not listed on CISA's KEV catalog, public exploit modules, including a Metasploit module, are readily available, and the vulnerability has garnered significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
2.8.10CPE matchmatch criteria
cpe:2.3:a:openx:openx:2.8.10:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
70.65%
Probability of exploitation in next 30 days
EPSS Percentile
99.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Metasploit: OpenX Backdoor PHP Code Execution · Aug 7, 2013
ExploitDB: EDB-27529 · Aug 12, 2013
This CVE's current EPSS score of 0.7065 is in the 98th percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

exchange.xforce.ibmcloud.com / vulnerabilities/86259
Third Party AdvisoryVDB Entry
packetstormsecurity.com / files/cve/CVE-2013-4211
ExploitThird Party AdvisoryVDB Entry
exploit-db.com / exploits/27529
ExploitThird Party AdvisoryVDB Entry
openwall.com / lists/oss-security/2013/08/07/2
Mailing ListThird Party Advisory
securityfocus.com / bid/61650
Third Party AdvisoryVDB Entry