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CVE-2021-22122 (GCVE-0-2021-22122)

Vulnerability from cvelistv5 – Published: 2021-02-08 15:55 – Updated: 2024-10-25 14:00
VLAI Shadowserver Previdian
Summary
An improper neutralization of input during web page generation in FortiWeb GUI interface 6.3.0 through 6.3.7 and version before 6.2.4 may allow an unauthenticated, remote attacker to perform a reflected cross site scripting attack (XSS) by injecting malicious payload in different vulnerable API end-points.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-10-23 13:59 UTC
CWE
  • Execute unauthorized code or commands
Assigner
References
URL Tags
https://fortiguard.com/advisory/FG-IR-20-122 x_refsource_CONFIRM
Impacted products
Vendor Product Version CPE status
Fortinet Fortinet FortiWeb Affected: FortiWeb 6.3.0 through 6.3.7 and version before 6.2.4
guessed Create a notification for this product.
Shadowserver
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: ca03c7f5-96d6-4e4f-a5db-8122bad44024

Vulnerability ID: CVE-2021-22122

Status: Confirmed

Status Updated: 2026-09-06 00:00 UTC

Exploited: Yes

Characteristics
Severity: 61.0
Timestamps
First Seen: 2023-10-23
Asserted: 2023-10-23
Last Seen: 2026-09-06
Scope
Asset Exposure: ['internet-facing']
Notes: Affected: Fortinet / FortiWeb | Class: firewall | Severity: Medium (CVSS 6.1) | IoT: no | In CISA KEV: no | Honeypot connections on 2026-09-06: 9
Evidence

Type: Honeypot

Signal: In The Wild Attempts

Confidence: 70%

Source: shadowserver

Details
1D 2
Iot no
Feed Shadowserver Foundation honeypot/exploited-vulnerabilities
Type http-scan
Class firewall
7D Avg 0
Vendor Fortinet
30D Avg 0
90D Avg 0
Product FortiWeb
Cisa Kev no
Connections 9
Observation Date 2026-09-06
Vulnerability Class CVSS
Vulnerability Score 6.1
Vulnerability Severity Medium
References
Created: 2026-07-01 05:54 UTC | Updated: 2026-09-08 01:01 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: f69c45dd-29e7-4e31-b847-01154f0d22f2

Vulnerability ID: CVE-2021-22122

Status: Confirmed

Status Updated: 2025-12-28 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2025-12-28
Asserted: 2025-12-28
Scope
Notes: KEVIntel entry: An improper neutralization of input during web page generation in FortiWeb GUI interface 6.3.0 through 6.3.7 and version before 6.2.4 may allow an... | Affected: Fortinet / Fortinet FortiWeb | CVSS: 6.1 (MEDIUM) | Used in malware: unknown | Not yet in CISA KEV: True
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: kevintel

Details
Feed KEVIntel (kevintel.com)
Title An improper neutralization of input during web page generation in FortiWeb GUI interface 6.3.0 through 6.3.7 and version before 6.2.4 may allow an...
Vendor Fortinet
Product Fortinet FortiWeb
Added Date 2025-12-28T00:00:00.000Z
Cvss Score 6.1
Epss Score None
Cvss Severity MEDIUM
Epss Percentile None
Used In Malware unknown
Ahead Of Cisa Kev None
Not Yet In Cisa Kev True
References
Created: 2026-06-19 12:42 UTC | Updated: 2026-06-19 12:42 UTC
Show details on NVD website
To clipboard 

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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


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