CVE-2011-4558Public exploitNetwork attack vector

Administrator-level PHP code execution via preg_replace evaluation

Published Jan 27, 2020 · Updated Aug 7, 2024

PHP code injection in Tiki 8.2 and earlier allows remote authenticated users with administrator access to execute arbitrary PHP code. The snarf_ajax.php endpoint forwards regex and regexres to the SNARF plugin; a null byte bypasses its e-modifier check, so preg_replace evaluates regexres as PHP. Exploitation requires an administrator account and the non-default PluginSnarf feature, and the injected code runs in the web application context.

CVSS severity7.2
High
EPSS probability4.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

PHP code injection in Tiki 8.2 and earlier allows remote authenticated users with administrator access to execute arbitrary PHP code. The snarf_ajax.php endpoint forwards regex and regexres to the SNARF plugin; a null byte bypasses its e-modifier check, so preg_replace evaluates regexres as PHP. Exploitation requires an administrator account and the non-default PluginSnarf feature, and the injected code runs in the web application context.

The record

CVE
CVE-2011-4558
Published
Jan 27, 2020
Updated
Aug 7, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-74, T1059
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jan 27, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 7, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.0NIST NVDAV:N/AC:M/Au:S/C:P/I:P/A:P
7.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
T1059Command and Scripting Interpreter

Public exploit references

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Technologies

Your stack

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Your stack

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