CVE-2026-51953Public exploitNetwork attack vector

Account takeover via reusable post-logout sessions

Published Jul 31, 2026 · Updated Jul 31, 2026

Session invalidation failure in FeehiCMS 2.1.1 allows remote attackers to reuse captured cookies and take over user accounts after logout. The logout handler fails to destroy the server-side PHPSESSID and identity session, so authenticated requests continue to accept both values. Access requires obtaining a victim’s cookies; reused cookies grant that account’s permissions, including administrator access when the victim is an administrator.

CVSS severity7.4
High
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Session invalidation failure in FeehiCMS 2.1.1 allows remote attackers to reuse captured cookies and take over user accounts after logout. The logout handler fails to destroy the server-side PHPSESSID and identity session, so authenticated requests continue to accept both values. Access requires obtaining a victim’s cookies; reused cookies grant that account’s permissions, including administrator access when the victim is an administrator.

The record

CVE
CVE-2026-51953
Published
Jul 31, 2026
Updated
Jul 31, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-613, T1550.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 31, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 31, 2026Record 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

7.4CISA-ADPCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-613Insufficient Session Expiration
T1550.004Use Alternate Authentication Material: Web Session Cookie

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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