How severe is CVE-2020-18699?

CVE-2020-18699 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2020-18699 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-18699?

CVE-2020-18699 affects Talelin Lin-cms-flask. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-18699?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-18699 published?

CVE-2020-18699 was published on 2021-08-16 and last updated on 2026-06-17.

CVE-2020-18699

CVE-2020-18699 is a medium-severity vulnerability in Talelin Lin-cms-flask with a CVSS 3.x base score of 6.1. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Talelin Lin-cms-flask
Published: 2021-08-16
Last modified: 2026-06-17

Description

Cross Site Scripting (XSS) in Lin-CMS-Flask v0.1.1 allows remote attackers to execute arbitrary code by entering scripts in the the 'Username' parameter of the in component 'app/api/cms/user.py'.

Frequently asked questions

What is CVE-2020-18699?: Cross Site Scripting (XSS) in Lin-CMS-Flask v0.1.1 allows remote attackers to execute arbitrary code by entering scripts in the the 'Username' parameter of the in component 'app/api/cms/user.py'.
How severe is CVE-2020-18699?: CVE-2020-18699 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2020-18699 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-18699?: CVE-2020-18699 affects Talelin Lin-cms-flask. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-18699?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-18699 published?: CVE-2020-18699 was published on 2021-08-16 and last updated on 2026-06-17.

References

https://github.com/TaleLin/lin-cms-flask/issues/28

Affected products (1)

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

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