CVE-2023-5866Public exploitNetwork attack vector

Session-token disclosure via cookies lacking Secure flag

Published Oct 31, 2023 · Updated Sep 5, 2024

Sensitive cookie exposure in phpMyFAQ before 3.2.1 allows man-in-the-middle attackers to read session and CSRF tokens via HTTP requests. The Token::setSession method creates its CSRF cookie without Secure, HttpOnly, SameSite, path, or domain attributes, while Session::setCookie marks cookies Secure only when the HTTPS server value equals ON. Exposure requires a browser to revisit the deployment over HTTP after cookie issuance, placing affected tokens on the unencrypted connection.

CVSS severity6.3
Medium
EPSS probability0.29%
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 phpMyFAQ before 3.2.1 allows man-in-the-middle attackers to read session and CSRF tokens via HTTP requests. The Token::setSession method creates its CSRF cookie without Secure, HttpOnly, SameSite, path, or domain attributes, while Session::setCookie marks cookies Secure only when the HTTPS server value equals ON. Exposure requires a browser to revisit the deployment over HTTP after cookie issuance, placing affected tokens on the unencrypted connection.

The record

CVE
CVE-2023-5866
Published
Oct 31, 2023
Updated
Sep 5, 2024
Vendor
Thorsten Rinne
Product
phpMyFAQ
Classifications
CWE-614, T1557
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 31, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 5, 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 <3.2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

Thorsten Rinne · phpMyFAQversion=unspecified <3.2.1

Published CVSS scores

6.3GitHubCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
5.7NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/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.

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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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-614Sensitive Cookie in HTTPS Session Without 'Secure' Attribute
T1557Adversary-in-the-Middle

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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