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CVE-2021-38243

28
FAUCET Score

CVE-2021-38243 is a critical remote code execution (RCE) vulnerability affecting xunruicms up to version 4.5.1, allowing attackers to execute arbitrary code through a crafted GET request to /index.php. With a CVSS score of 9.8, this vulnerability is highly severe, requiring no authentication or user interaction, and can lead to complete compromise of confidentiality, integrity, and availability. Despite its critical nature, there is currently no public exploit code available (Metasploit, Nuclei, ExploitDB), and it is not listed in CISA's KEV catalog, indicating no active exploitation. Community discussion and media coverage are also minimal, suggesting low public awareness.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.5.1CPE matchmatch criteria
cpe:2.3:a:xunruicms:xunruicms:*:*:*:*:*:*:*:*

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
1.30%
Probability of exploitation in next 30 days
EPSS Percentile
67.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0130 is in the 54th percentile among its peer group of 36,835 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

Remediation records are not available for this CVE.

References

github.com / P0wfuu/xunruicms-RCE
ExploitThird Party Advisory