A reflected cross-site scripting (XSS) vulnerability in the Symantec Layer7 API Management OAuth Toolkit (OTK) allows a remote attacker to…

published 2022-02-18 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-17567

cvss: 6.1; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.7%; EPSS 0.7% chance of exploitation in 30 days, percentile 54%
public exploits: 0; none known

A reflected cross-site scripting (XSS) vulnerability in the Symantec Layer7 API Management OAuth Toolkit (OTK) allows a remote attacker to craft a malicious URL for the OTK web UI and target OTK users with phishing attacks or other social engineering techniques. A successful attack allows injecting malicious code into the OTK web UI client application.

Patch / fix

fixed in 1

broadcom layer7_api_management_oauth_toolkit 4.4.1

Exploit prediction

0.72% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:N/I:P/A:N

Affected products

n/a Layer7 API Management OAuth Toolkit (OTK)

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

support.broadcom.com /web/ecx/support-content-notification/-/external/content/SecurityAdvisories/CVE-2021-30650-Layer7-OAuth-Toolki
vendor-advisory

Sources

CVE List CVE-2021-30650
NVD CVE-2021-30650

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary