CVE-2021-42549
reflected XSS in search functionality of WP Cloud Plugins - Lets-Box
Insufficient Input Validation in the search functionality of Wordpress plugin Lets-Box prior to 1.15.3 allows unauthenticated user to craft a reflected Cross-Site Scripting attack.
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
- None
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
reflected XSS in search functionality of WP Cloud Plugins - Lets-Box
Insufficient Input Validation in the search functionality of Wordpress plugin Lets-Box prior to 1.15.3 allows unauthenticated user to craft a reflected Cross-Site Scripting attack.
- Record
CVE-2021-42549- CVSS 3.1
- 4.7 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
EUVDEUVD-2021-29518
Insufficient Input Validation in the search functionality of Wordpress plugin Lets-Box prior to 1.15.3 allows unauthenticated user to craft a reflected Cross-Site Scripting attack.
- Record
EUVD-2021-29518- CVSS 3.1
- 4.7 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-vvwh-jqqq-8v6c No score
Insufficient Input Validation in the search functionality of Wordpress plugin Lets-Box prior to 1...
Insufficient Input Validation in the search functionality of Wordpress plugin Lets-Box prior to 1.15.3 allows unauthenticated user to craft a reflected Cross-Site Scripting attack.
- Record
GHSA-vvwh-jqqq-8v6c- Weakness
- CWE-79
- Updated
- 2026-11-02
NVD
Insufficient Input Validation in the search functionality of Wordpress plugin Lets-Box prior to 1.15.3 allows unauthenticated user to craft a reflected Cross-Site Scripting attack.
- Record
CVE-2021-42549- CVSS 3.1
- 4.7 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A: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 - 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
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-2021-42549 is a medium vulnerability (CVSS 4.7) in Wp Cloud Plugins Lets-box, published December 13, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.75%, the 55th percentile. No source names a fixed version.