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CVE-2021-36910

19
FAUCET Score

CVE-2021-36910 describes an authenticated Stored Cross-Site Scripting (XSS) vulnerability affecting the WP-Appbox WordPress plugin up to version 4.3.20. This medium-severity flaw (CVSS 4.8) requires administrator privileges for exploitation, allowing an attacker to inject malicious scripts that could impact other users. While the attack complexity is low, the potential impact on confidentiality and integrity is limited. Currently, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.3.20CPE matchmatch criteria
cpe:2.3:a:wp-appbox_project:wp-appbox:*:*:*:*:*:wordpress:*:*

CVSS Data

CVSS version used by this source: 3.1

3.4LOW

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:N/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
1.7
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.58%
Probability of exploitation in next 30 days
EPSS Percentile
44.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0058 is in the 73rd percentile among its peer group of 4,937 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

patchstack.com / database/vulnerability/wp-appbox/wordpress-wp-appbox-plugin-4-3-20-authenticated-stored-cross-site-scripting-xss-vulnerability
Third Party Advisory
wordpress.org / plugins/wp-appbox
ProductThird Party Advisory