CVE-2025-11699Public exploitNetwork attack vector

Session hijacking via reusable logout cookie

Published Dec 1, 2025 · Updated Dec 1, 2025

Insufficient session expiration in nopCommerce before 4.70 and 4.80.3 allows remote attackers with a valid cookie to hijack sessions. The login feature leaves the .Nop.Authentication cookie valid after logout or session termination, and the server continues accepting it at privileged endpoints such as /Admin. Exploitation requires a previously issued cookie obtained from a legitimate session and grants access only within that cookie holder's permissions.

CVSS severity7.1
High
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insufficient session expiration in nopCommerce before 4.70 and 4.80.3 allows remote attackers with a valid cookie to hijack sessions. The login feature leaves the .Nop.Authentication cookie valid after logout or session termination, and the server continues accepting it at privileged endpoints such as /Admin. Exploitation requires a previously issued cookie obtained from a legitimate session and grants access only within that cookie holder's permissions.

The record

CVE
CVE-2025-11699
Published
Dec 1, 2025
Updated
Dec 1, 2025
Vendor
Nop Solutions
Product
nopCommerce
Classifications
CWE-613, T1550.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 1, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 1, 2025Record 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=4.10 <4.70
  2. Affected versionversion=4.80.3 <=4.80.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Nop Solutions · nopCommerceversion=4.10 <4.70; version=4.80.3 <=4.80.4

Published CVSS scores

7.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/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 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 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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