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CVE-2020-21653

28
FAUCET Score

CVE-2020-21653 describes a critical Server-Side Request Forgery (SSRF) vulnerability in Myucms v2.2.1, specifically within the sj() method of the \controller\index.php component. This vulnerability carries a CVSS score of 9.1 (Critical) due to its network-based attack vector, low attack complexity, and potential for high impact on confidentiality and integrity without requiring user interaction or privileges. While the vulnerability is severe, there is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding it.

Impacted Technologies

VendorProductVersion(s)CPE
2.2CPE matchmatch criteria
cpe:2.3:a:myucms_project:myucms:2.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.1CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.19%
Probability of exploitation in next 30 days
EPSS Percentile
64.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0119 is in the 51st percentile among its peer group of 36,833 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 / lolipop1234/XXD/issues/5
ExploitThird Party Advisory