CVE-2020-12511Network attack vector

Unauthorized configuration changes via missing CSRF protection

Published Jan 22, 2021 · Updated Sep 17, 2024

Cross-Site Request Forgery in Pepperl+Fuchs Comtrol IO-Link Master 1.5.48 and earlier allows remote attackers to change device settings via the web interface. The interface accepts cross-site POST requests without CSRF protection, allowing a victim's browser session to submit configuration changes such as hostname or network parameters. Exploitation requires luring an authenticated web user to a malicious page, and can alter device operation or connectivity.

CVSS severity8.8
High
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-Site Request Forgery in Pepperl+Fuchs Comtrol IO-Link Master 1.5.48 and earlier allows remote attackers to change device settings via the web interface. The interface accepts cross-site POST requests without CSRF protection, allowing a victim's browser session to submit configuration changes such as hostname or network parameters. Exploitation requires luring an authenticated web user to a malicious page, and can alter device operation or connectivity.

The record

CVE
CVE-2020-12511
Published
Jan 22, 2021
Updated
Sep 17, 2024
Vendor
Pepperl+Fuchs
Product
Comtrol IO-Link Master
Classifications
CWE-352, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 22, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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=unspecified <=1.5.48

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Pepperl+Fuchs · Comtrol IO-Link Masterversion=unspecified <=1.5.48

Published CVSS scores

8.8CERT VDECVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8NVDAV:N/AC:M/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 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-352Cross-Site Request Forgery (CSRF)
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

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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