CVE-2021-36686

FAUCET Score

CVE-2021-36686 is a Cross-Site Scripting (XSS) vulnerability in yapi version 1.9.1, allowing authenticated attackers to execute arbitrary code through the /interface/api edit page. Rated as Medium severity (CVSS 5.4), it requires user interaction and low privileges, potentially leading to limited confidentiality and integrity impacts. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

Vendor	Product	Version(s)	CPE
		1.9.1CPE matchmatch criteria	cpe:2.3:a:ymfe:yapi:1.9.1:::::::*

CVSS Data

CVSS version used by this source: 3.1

5.4MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

Exploitability Score

2.3

Impact Score

2.7

CvssVersion

3.1

Exploit Intelligence

EPSS Score

0.54%

Probability of exploitation in next 30 days

EPSS Percentile

42.2%

Percentile rank of EPSS score among Peer Group

As of 2026-07-27

Model: v2026.06.15

This CVE's current EPSS score of 0.0054 is in the 67th percentile among its peer group of 15,224 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 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 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

npmGHSA-4jqw-vfmj-9rmhmedium

Cross-site Scripting in yapi-vendor

Jan 26, 2023

References

github.com / YMFE/yapi/issues/2190

ExploitThird Party Advisory

github.com / YMFE/yapi/issues/2240