CVE-2023-3520Network attack vector

Session cookie disclosure via missing Secure flags

Published Jul 6, 2023 · Updated Oct 31, 2024

Sensitive-cookie exposure in AVENDIS GmbH openITCOCKPIT before 4.6.6 allows attackers to intercept authenticated session cookies over HTTP. Cookie-setting code in CSRF middleware, authentication configuration, statistics choices, and Xdebug omits the Secure flag, causing unencrypted transmission. Exploitation requires creation of an authenticated cookie and an on-path position capable of capture and replay.

CVSS severity4.3
Medium
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Sensitive-cookie exposure in AVENDIS GmbH openITCOCKPIT before 4.6.6 allows attackers to intercept authenticated session cookies over HTTP. Cookie-setting code in CSRF middleware, authentication configuration, statistics choices, and Xdebug omits the Secure flag, causing unencrypted transmission. Exploitation requires creation of an authenticated cookie and an on-path position capable of capture and replay.

The record

CVE
CVE-2023-3520
Published
Jul 6, 2023
Updated
Oct 31, 2024
Vendor
AVENDIS GmbH
Product
openITCOCKPIT
Classifications
CWE-614, CAPEC-102, T1539
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 6, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 31, 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=0 <4.6.6
  2. Affected versionversion=unspecified <4.6.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

AVENDIS GmbH · openITCOCKPITversion=0 <4.6.6; version=unspecified <4.6.6

Published CVSS scores

4.3@huntrdevCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/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.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-614Sensitive Cookie in HTTPS Session Without 'Secure' Attribute
CAPEC-102Session Sidejacking
T1539Steal Web Session Cookie

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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