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CVE-2021-39391

21
FAUCET Score

CVE-2021-39391 is a Cross-Site Scripting (XSS) vulnerability found in the admin panel of Beego v2.0.1. This medium-severity flaw (CVSS 6.1) allows an attacker to inject malicious scripts via the URI path in an HTTP request, which are then executed when an administrator views the "Request Statistics" page. While the attack complexity is low and no authentication is required, it necessitates user interaction from an administrator. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
2.0.1CPE matchmatch criteria
cpe:2.3:a:beego:beego:2.0.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.1MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.80%
Probability of exploitation in next 30 days
EPSS Percentile
52.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0080 is in the 60th percentile among its peer group of 26,236 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 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 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
gopatch availablevia ghsa
Product: github.com/beego/beego/v2Fixed in: 2.0.2

Vendor Advisories (1)

goGHSA-c77f-4rgj-jfr4medium

Cross-site Scripting in Beego

Sep 15, 2021

References

github.com / beego/beego
Third Party Advisory
github.com / beego/beego/issues/4727
ExploitIssue TrackingPatchThird Party Advisory