CVE-2021-20784
HTTP header injection vulnerability in Everything all versions except the Lite version may allow...
HTTP header injection vulnerability in Everything version 1.0, 1.1, and 1.2 except the Lite version may allow a remote attacker to inject an arbitrary script or alter the website that uses the product.
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
CVE List Score used
HTTP header injection vulnerability in Everything version 1.0, 1.1, and 1.2 except the Lite version may allow a remote attacker to inject an arbitrary script or alter the website that uses the product.
- Record
CVE-2021-20784- CVSS 3.0
- 6.1 Medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-644
- Updated
- 2026-11-02
EUVDEUVD-2021-8196
HTTP header injection vulnerability in Everything version 1.0, 1.1, and 1.2 except the Lite version may allow a remote attacker to inject an arbitrary script or alter the website that uses the product.
- Record
EUVD-2021-8196- CVSS 3.0
- 6.1 Medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-vxfp-88g2-6m62
HTTP header injection vulnerability in Everything all versions except the Lite version may allow...
HTTP header injection vulnerability in Everything all versions except the Lite version may allow a remote attacker to inject an arbitrary script or alter the website that uses the product via unspecified vectors.
- Record
GHSA-vxfp-88g2-6m62- 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-644
- Updated
- 2026-11-02
NVD
HTTP header injection vulnerability in Everything version 1.0, 1.1, and 1.2 except the Lite version may allow a remote attacker to inject an arbitrary script or alter the website that uses the product.
- Record
CVE-2021-20784- 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 3.0
- 6.1 Medium
CVSS:3.0/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-644
- 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-2021-20784 is a medium vulnerability (CVSS 6.1) in Voidtools Everything, published July 14, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.12%, the 66th percentile. No source names a fixed version.