CVE-2021-25033
Noptin < 1.6.5 - Open Redirect
The WordPress Newsletter Plugin WordPress plugin before 1.6.5 does not validate the to parameter before redirecting the user to its given value, leading to an open redirect issue
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
The WordPress Newsletter Plugin WordPress plugin before 1.6.5 does not validate the to parameter before redirecting the user to its given value, leading to an open redirect issue
- Record
CVE-2021-25033- 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
- 5.8 Medium
AV:N/AC:M/Au:N/C:P/I:P/A:N - Weakness
- CWE-601
- Updated
- 2026-11-02
CVE List No score
Noptin < 1.6.5 - Open Redirect
The WordPress Newsletter Plugin WordPress plugin before 1.6.5 does not validate the to parameter before redirecting the user to its given value, leading to an open redirect issue
- Record
CVE-2021-25033- Weakness
- CWE-601
- Updated
- 2026-11-02
EUVDEUVD-2021-11945 No score
The WordPress Newsletter Plugin WordPress plugin before 1.6.5 does not validate the to parameter before redirecting the user to its given value, leading to an open redirect issue
- Record
EUVD-2021-11945- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-gxrq-7hvq-53q3 No score
The WordPress Newsletter Plugin WordPress plugin before 1.6.5 does not validate the to parameter...
The WordPress Newsletter Plugin WordPress plugin before 1.6.5 does not validate the to parameter before redirecting the user to its given value, leading to an open redirect issue
- Record
GHSA-gxrq-7hvq-53q3- Weakness
- CWE-601
- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Nuclei | Noptin < 1.6.5 - Open Redirect |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, Nuclei, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-25033 is a medium vulnerability (CVSS 6.1) in Noptin, published February 14, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.30%, the 83rd percentile. No source names a fixed version.