CVE-2020-18701Public exploitNetwork attack vector

Protected-data access via logged-out token replay

Published Aug 16, 2021 · Updated Aug 4, 2024

Incorrect access control in TaleLin Lin-CMS-Flask 0.1.1 allows remote attackers to access protected data by replaying a logged-out token. The logout session handling leaves the authentication token valid, and protected API endpoints continue accepting it after logout. Exploitation requires possession of a previously issued token and grants the authorization associated with that token, including access to the user list.

CVSS severity9.8
Critical
EPSS probability2.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect access control in TaleLin Lin-CMS-Flask 0.1.1 allows remote attackers to access protected data by replaying a logged-out token. The logout session handling leaves the authentication token valid, and protected API endpoints continue accepting it after logout. Exploitation requires possession of a previously issued token and grants the authorization associated with that token, including access to the user list.

The record

CVE
CVE-2020-18701
Published
Aug 16, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-613, CWE-863, T1078
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 16, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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?

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

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NIST NVDAV:N/AC:L/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 exploitPublished

Weakness, pattern, technique

CWE-613Insufficient Session Expiration
CWE-863Incorrect Authorization
T1078Valid Accounts

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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