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CVE-2021-40970

29
FAUCET Score

CVE-2021-40970 is a cross-site scripting (XSS) vulnerability affecting Spotweb versions 1.5.1 and below, specifically within the templates/installer/step-004.inc.php file. An unauthenticated attacker can inject arbitrary web script or HTML by manipulating the username parameter. This vulnerability has a CVSS score of 6.1 (Medium), indicating a network-based attack requiring user interaction, with potential for low impact on confidentiality and integrity. While no active exploitation or Metasploit modules are reported, a Nuclei template exists, and there is minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.5.1CPE matchmatch criteria
cpe:2.3:a:spotweb_project:spotweb:*:*:*:*:*:*:*:*

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
2.24%
Probability of exploitation in next 30 days
EPSS Percentile
81.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Nuclei: CVE-2021-40970 · Jun 5, 2023
This CVE's current EPSS score of 0.0224 is in the 91st percentile among its peer group of 26,221 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

Remediation records are not available for this CVE.

References

github.com / spotweb/spotweb
Third Party Advisory
github.com / spotweb/spotweb/issues/711
ExploitIssue TrackingThird Party Advisory