CVE-2021-42650
Cross Site Scripting (XSS vulnerability exists in Portainer before 2.9.1 via the node input box...
Cross Site Scripting (XSS vulnerability exists in Portainer before 2.9.1 via the node input box in Custom Templates.
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 vulnerability exists in Portainer before 2.9.1 via the node input box in Custom Templates.
- Record
CVE-2021-42650- 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 vulnerability exists in Portainer before 2.9.1 via the node input box in Custom Templates.
- Record
CVE-2021-42650- Updated
- 2026-11-02
EUVDEUVD-2021-29613 No score
Cross Site Scripting (XSS vulnerability exists in Portainer before 2.9.1 via the node input box in Custom Templates.
- Record
EUVD-2021-29613- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-v3j8-q37p-7695 No score
Cross Site Scripting (XSS vulnerability exists in Portainer before 2.9.1 via the node input box...
Cross Site Scripting (XSS vulnerability exists in Portainer before 2.9.1 via the node input box in Custom Templates.
- Record
GHSA-v3j8-q37p-7695- Weakness
- CWE-79
- Updated
- 2026-11-02
OSV
Cross Site Scripting (XSS vulnerability exists in Portainer before 2.9.1 via the node input box in Custom Templates.
- Record
CVE-2021-42650- 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 - Updated
- 2026-11-02
Affected products
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-2021-42650 is a medium vulnerability (CVSS 6.1) in Portainer, published October 18, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.63%, the 50th percentile. No source names a fixed version.