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CVE-2021-22122

35
FAUCET Score

CVE-2021-22122 describes a reflected cross-site scripting (XSS) vulnerability in the FortiWeb GUI interface, affecting versions 6.3.0 through 6.3.7 and versions prior to 6.2.4. This flaw allows an unauthenticated, remote attacker to inject malicious payloads into vulnerable API endpoints during web page generation. The vulnerability has a CVSS score of 6.1 (Medium), indicating a low attack complexity and requiring user interaction, with potential impacts on confidentiality and integrity. While not listed in CISA's KEV catalog or actively exploited, Nuclei templates exist for detection, but there is no public Metasploit or ExploitDB code, and community discussion and media coverage are minimal.

Impacted Technologies

VendorProductVersion(s)CPE
<= 6.2.3CPE matchmatch criteria
cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:*
>= 6.3.0, <= 6.3.7CPE matchmatch criteria
cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:*

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
10.52%
Probability of exploitation in next 30 days
EPSS Percentile
95.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Nuclei: CVE-2021-22122 · Feb 4, 2021
This CVE's current EPSS score of 0.1052 is in the 98th percentile among its peer group of 26,234 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

Vendor Patches (1)

fortinetvendor investigatingvia nvd_reference
View patch

References

fortiguard.com / advisory/FG-IR-20-122
Vendor Advisory