How severe is CVE-2020-18701?

CVE-2020-18701 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-18701 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-18701?

CVE-2020-18701 affects Talelin Lin-cms-flask. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-18701?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2020-18701 published?

CVE-2020-18701 was published on 2021-08-16 and last updated on 2026-06-17.

CVE-2020-18701

CVE-2020-18701 is a critical-severity vulnerability in Talelin Lin-cms-flask with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-863.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-863
Affected product: Talelin Lin-cms-flask
Published: 2021-08-16
Last modified: 2026-06-17

Description

Incorrect Access Control in Lin-CMS-Flask v0.1.1 allows remote attackers to obtain sensitive information and/or gain privileges due to the application not invalidating a user's authentication token upon logout, which allows for replaying packets.

Frequently asked questions

What is CVE-2020-18701?: Incorrect Access Control in Lin-CMS-Flask v0.1.1 allows remote attackers to obtain sensitive information and/or gain privileges due to the application not invalidating a user's authentication token upon logout, which allows for replaying packets.
How severe is CVE-2020-18701?: CVE-2020-18701 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-18701 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-18701?: CVE-2020-18701 affects Talelin Lin-cms-flask. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-18701?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-18701 published?: CVE-2020-18701 was published on 2021-08-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:talelin:lin-cms-flask:0.1.1:*:*:*:*:*:*:*

More vulnerabilities in Talelin Lin-cms-flask

CVE-2020-18698 — Critical (CVSS 9.8): Improper Authentication in Lin-CMS-Flask v0.1.1 allows remote attackers to launch brute force login attempts without…
CVE-2020-18699 — Medium (CVSS 6.1): Cross Site Scripting (XSS) in Lin-CMS-Flask v0.1.1 allows remote attackers to execute arbitrary code by entering…

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