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CVE-2021-3683

23
FAUCET Score

CVE-2021-3683 describes a Cross-Site Request Forgery (CSRF) vulnerability affecting showdoc. This medium-severity vulnerability, rated 6.5 CVSS, allows an attacker to trick an authenticated user into performing unintended actions, potentially leading to high integrity impacts without affecting confidentiality or availability. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.9.12CPE matchmatch criteria
cpe:2.3:a:showdoc:showdoc:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.4MEDIUM

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.5
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.40%
Probability of exploitation in next 30 days
EPSS Percentile
32.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0040 is in the 33rd percentile among its peer group of 26,219 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 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

Vendor Advisories (1)

composerGHSA-x5jp-9fmm-m9pfmedium

showdoc is vulnerable to Cross-Site Request Forgery (CSRF)

Nov 15, 2021

References

github.com / star7th/showdoc/commit/67093c879a6563aa6ee08003177777d1975e2351
PatchThird Party Advisory
huntr.dev / bounties/063a339a-5d78-40d6-a96a-6716960e8134
ExploitPatchThird Party Advisory