CVE-2021-20725
Reflected cross-site scripting vulnerability in the admin page of [Calendar01] free edition ver1...
Reflected cross-site scripting vulnerability in the admin page of [Calendar01] free edition ver1.0.1 and earlier allows a remote attacker to inject an arbitrary script via unspecified vectors.
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
Reflected cross-site scripting vulnerability in the admin page of [Calendar01] free edition ver1.0.1 and earlier allows a remote attacker to inject an arbitrary script via unspecified vectors.
- Record
CVE-2021-20725- 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
Reflected cross-site scripting vulnerability in the admin page of [Calendar01] free edition ver1.0.1 and earlier allows a remote attacker to inject an arbitrary script via unspecified vectors.
- Record
CVE-2021-20725- Updated
- 2026-11-02
EUVDEUVD-2021-8139 No score
Reflected cross-site scripting vulnerability in the admin page of [Calendar01] free edition ver1.0.1 and earlier allows a remote attacker to inject an arbitrary script via unspecified vectors.
- Record
EUVD-2021-8139- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-62qp-vfx5-7cj5 No score
Reflected cross-site scripting vulnerability in the admin page of [Calendar01] free edition ver1...
Reflected cross-site scripting vulnerability in the admin page of [Calendar01] free edition ver1.0.1 and earlier allows a remote attacker to inject an arbitrary script via unspecified vectors.
- Record
GHSA-62qp-vfx5-7cj5- Weakness
- CWE-79
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-20725 is a medium vulnerability (CVSS 6.1) in Calendar01 Project Calendar01, published May 24, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.78%, the 56th percentile. No source names a fixed version.