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CVE-2021-41745

29
FAUCET Score

CVE-2021-41745 is a critical file upload vulnerability in ShowDoc 2.8.3, allowing unauthenticated attackers to upload malicious files and potentially gain full control over the server. With a CVSS score of 9.8, it presents a severe risk due to its network-based attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. While no active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB) has been identified, and community discussion is minimal, its high FAUCET Risk Score of 78/100 indicates a significant inherent danger.

Impacted Technologies

VendorProductVersion(s)CPE
2.8.3CPE matchmatch criteria
cpe:2.3:a:showdoc:showdoc:2.8.3:*:*:*:*:*:*:*

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
1.34%
Probability of exploitation in next 30 days
EPSS Percentile
68.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0135 is in the 55th 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

Patch Available

Vendor Patches (1)

composerpatch availablevia ghsa
Product: showdoc/showdocFixed in: 2.8.5

Vendor Advisories (1)

composerGHSA-4286-h47h-m5v6critical

Showdoc File Upload Vulnerability

Oct 25, 2021

References

github.com / purple-WL/SHOWDOC-file-upload-vulnerability
Third Party Advisory
cnvd.org.cn / flaw/show/CNVD-2020-49480
Third Party Advisory