CVE-2011-3203Public exploitNetwork attack vector

Unauthenticated PHP code execution via attachment parameter

Published Jan 14, 2020 · Updated Aug 6, 2024

Code execution in Jcow CMS 4.x through 4.2 and 5.x through 5.2 allows remote attackers to run arbitrary PHP via attachment. In includes/libs/ss.inc.php, the handler uses the unsanitized POST attachment value to construct a module include path and an eval-built ajax_post call. No authentication or user interaction is required, and successful exploitation runs attacker-selected PHP code in the web server context.

CVSS severity9.8
Critical
EPSS probability2.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code execution in Jcow CMS 4.x through 4.2 and 5.x through 5.2 allows remote attackers to run arbitrary PHP via attachment. In includes/libs/ss.inc.php, the handler uses the unsanitized POST attachment value to construct a module include path and an eval-built ajax_post call. No authentication or user interaction is required, and successful exploitation runs attacker-selected PHP code in the web server context.

The record

CVE
CVE-2011-3203
Published
Jan 14, 2020
Updated
Aug 6, 2024
Vendor
Jcow
Product
Jcow CMS
Classifications
CWE-20, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 14, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.x to 4.2 and 5.x to 5.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Jcow · Jcow CMSversion=4.x to 4.2 and 5.x to 5.2

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-20Improper Input Validation
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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