CVE-2021-41403

FAUCET Score

CVE-2021-41403 is a critical server-side request forgery (SSRF) vulnerability affecting flatCore-CMS version 2.0.8, stemming from the application's use of dangerous functions. With a CVSS score of 9.8, this vulnerability allows unauthenticated attackers to remotely execute arbitrary code, leading to complete compromise of confidentiality, integrity, and availability. While no public exploit code or active exploitation has been observed, and community discussion is minimal, the high severity warrants immediate patching for affected systems.

Impacted Technologies

Vendor	Product	Version(s)	CPE
		2.0.8CPE matchmatch criteria	cpe:2.3:a:flatcore:flatcore-cms:2.0.8:::::::*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

Exploitability Score

3.9

Impact Score

5.9

CvssVersion

3.1

Exploit Intelligence

EPSS Score

17.64%

Probability of exploitation in next 30 days

EPSS Percentile

96.8%

Percentile rank of EPSS score among Peer Group

As of 2026-07-27

Model: v2026.06.15

This CVE's current EPSS score of 0.1764 is in the 93rd percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference

View patch

References

github.com / flatCore/flatCore-CMS/issues/60

ExploitPatchThird Party Advisory