CVE-2011-5018Network attack vector

Script execution via unescaped 404 request URI

Published Jan 8, 2020 · Updated Aug 7, 2024

Cross-site scripting in Koala Framework before 2011-11-21 allows remote attackers to execute script in a user's browser via a crafted request URI. Kwf/Exception/Abstract.php copies the server-supplied REQUEST_URI value into the requestUri view variable for 404 pages without HTML escaping. Exploitation requires a user to open an attacker-crafted URL that reaches a 404 page, enabling script execution in that page's browser context.

CVSS severity6.1
Medium
EPSS probability1.00%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Koala Framework before 2011-11-21 allows remote attackers to execute script in a user's browser via a crafted request URI. Kwf/Exception/Abstract.php copies the server-supplied REQUEST_URI value into the requestUri view variable for 404 pages without HTML escaping. Exploitation requires a user to open an attacker-crafted URL that reaches a 404 page, enabling script execution in that page's browser context.

The record

CVE
CVE-2011-5018
Published
Jan 8, 2020
Updated
Aug 7, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 8, 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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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