CVE-2021-3775

Cross-Site Request Forgery (CSRF) in star7th/showdoc

4.3 Medium

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

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: Low

Exploit likelihood

0.41%Down 0.2 points since Nov 14, 2021

What each source reports

CVE List Score used 4.3

Cross-Site Request Forgery (CSRF) in star7th/showdoc

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

Record: CVE-2021-3775
CVSS 3.0: 4.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Weakness: CWE-352
Updated: 2026-11-02

EUVDEUVD-2021-2373 4.3

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

Record: EUVD-2021-2373
CVSS 3.0: 4.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Updated: 2026-11-03

GitHub AdvisoriesGHSA-pjjf-hc4q-g298 4.3

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

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

Record: GHSA-pjjf-hc4q-g298
CVSS 3.0: 4.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Weakness: CWE-352
Updated: 2026-11-02

NVD 5.4

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

Record: CVE-2021-3775
CVSS 3.1: 5.4 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
CVSS 3.0: 4.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
CVSS 2.0: 5.8 MediumAV:N/AC:M/Au:N/C:P/I:P/A:N
Weakness: CWE-352
Updated: 2026-11-02

OSV 5.4

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

Record: CVE-2021-3775
CVSS 3.1: 5.4 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Updated: 2026-11-02

OSVGHSA-pjjf-hc4q-g298 4.3

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

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

Record: GHSA-pjjf-hc4q-g298
CVSS 3.0: 4.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Weakness: CWE-352
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`showdoc/showdoc` Packagist	through 2.9.12	None known
`showdoc/showdoc` Packagist	through 2.9.12, plus listed versions v1.0.0v1.0.1v1.0.2v1.0.3v1.0.4 Show 45 moreShow less v1.0.5v1.1.0v1.1.1v1.1.3v1.1.4v1.1.5v1.2.0v1.2.1v1.2.2v1.2.3v1.2.4v1.2.5v1.2.6v1.3.0v1.3.1v1.3.3v1.3.4v1.3.5v1.3.6v1.3.7v1.3.8v1.4.0v1.4.1v1.4.2v1.4.3v1.4.4v1.4.5v1.4.6v1.4.7v1.5.0v1.5.1v1.5.2v1.5.3v1.6.0v1.6.1v1.6.2v1.7.0v1.7.1v1.7.2v1.8.0v1.8.1v1.8.2v1.8.3v1.8.4v1.8.5	None known

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-3775 is a medium vulnerability (CVSS 4.3) in Showdoc, published November 13, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.41%, the 35th percentile. No source names a fixed version.

References

This page doesn't list everything

Left out here: 80 versions. The JSON record has them.