CVE-2020-18699
Lin-CMS-Flask Cross Site Scripting (XSS) vulnerability
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'.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
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'.
- Record
CVE-2020-18699- CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:P/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
CVE List No score
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'.
- Record
CVE-2020-18699- Updated
- 2026-11-02
EUVDEUVD-2021-0111 No score
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'.
- Record
EUVD-2021-0111- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-rvf8-c35m-8289
Lin-CMS-Flask Cross Site Scripting (XSS) vulnerability
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'.
- Record
GHSA-rvf8-c35m-8289- CVSS 4.0
- 5.3 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N - CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
OSVGHSA-rvf8-c35m-8289
Lin-CMS-Flask Cross Site Scripting (XSS) vulnerability
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'.
- Record
GHSA-rvf8-c35m-8289- CVSS 4.0
- 5.3 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N - CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
OSVPYSEC-2021-340 No score
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'.
- Record
PYSEC-2021-340- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
lin-cmsPyPI |
through 0.1.1b2 | None known |
lin-cmsPyPI |
through 0.1.1b2, plus listed versions 0.1.1a10.1.1a20.1.1a30.1.1a40.1.1a5 Show 4 moreShow less0.1.1a60.1.1a70.1.1a80.1.1b1 |
None known |
lin-cmsPyPI |
All versions, plus listed versions 0.1.1a10.1.1a20.1.1a30.1.1a40.1.1a5 Show 31 moreShow less0.1.1a60.1.1a70.1.1a80.1.1b10.1.1b20.1.1b30.1.1b40.2.0b10.2.0b20.2.0b30.3.0a100.3.0a20.3.0a30.3.0a40.3.0a50.3.0a60.3.0a70.3.0a80.3.0a90.3.10.4.00.4.100.4.110.4.20.4.30.4.40.4.50.4.60.4.70.4.80.4.9 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-18699 is a medium vulnerability (CVSS 6.1) in Talelin Lin-cms-flask, published August 16, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.28%, the 70th percentile. No source names a fixed version.