CVE-2012-1495Public exploitNetwork attack vector

Unauthenticated code execution via settings file rewrite

Published Jan 27, 2020 · Updated Aug 6, 2024

Code injection in WebCalendar before 1.2.5 allows remote attackers to execute arbitrary PHP via the form_single_user_login parameter. The unauthenticated installer copies the parameter into the single_user_login setting and rewrites includes/settings.php as executable PHP without neutralizing code delimiters. A reachable install/index.php and writable settings file are required; successful exploitation runs commands with the web server account's privileges.

CVSS severity9.8
Critical
EPSS probability79.76%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in WebCalendar before 1.2.5 allows remote attackers to execute arbitrary PHP via the form_single_user_login parameter. The unauthenticated installer copies the parameter into the single_user_login setting and rewrites includes/settings.php as executable PHP without neutralizing code delimiters. A reachable install/index.php and writable settings file are required; successful exploitation runs commands with the web server account's privileges.

The record

CVE
CVE-2012-1495
Published
Jan 27, 2020
Updated
Aug 6, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-74, T1505.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 27, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/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.

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

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
T1505.003Server Software Component: Web Shell

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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