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CVE-2020-21516

31
FAUCET Score

CVE-2020-21516 is a critical arbitrary file upload vulnerability in FeehiCMS version 2.0.8, specifically within the head image upload functionality. This flaw allows unauthenticated attackers to execute arbitrary PHP code remotely, leading to complete compromise of the affected system. With a CVSS score of 9.8 (Critical), it presents a high risk due to its network-based attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. While no active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion has been observed, the potential for severe damage necessitates immediate patching.

Impacted Technologies

VendorProductVersion(s)CPE
2.0.8CPE matchmatch criteria
cpe:2.3:a:feehi:feehicms: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
1.07%
Probability of exploitation in next 30 days
EPSS Percentile
61.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0107 is in the 47th 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 (2)

composerpatch availablevia ghsa
Product: feehi/cmsFixed in: 2.0.8.1
github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (1)

composerGHSA-jj62-mc3m-j769critical

FeehiCMS has an arbitrary file upload vulnerability

Sep 7, 2022

References

github.com / liufee/cms/issues/46
ExploitPatchThird Party Advisory