CVE-2021-22849

low-risk

Published 2021-01-22

Hyweb HyCMS-J1 backend editing function does not filter special characters. Users after log-in can inject JavaScript syntax to perform a stored XSS (Stored Cross-site scripting) attack.

Do I need to act?

0.17% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 4.6/10 Medium

NETWORK / LOW complexity

Affected Products (1)

Hycms-J1

Affected Vendors

Hyweb

References (2)

Third Party Advisory https://www.twcert.org.tw/tw/cp-132-4318-09cd3-1.html

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low-risk

Severity 19/34 · Moderate

Exploitability 1/34 · Minimal

Exposure 5/34 · Minimal