What’s Vulnerable › Vulnerabilities

CVE-2020-21494

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-10-04 · updated 2026-06-17
• Weakness: CWE-79

Description

A cross-site scripting (XSS) vulnerability in the component install\install.sql of Xiuno BBS 4.0.4 allows attackers to execute arbitrary web scripts or HTML via changing the doctype value to 0.

Affected products

• Xiunobbs: 4.0.4

References

• https://gitee.com/xiuno/xiunobbs/issues/I16BHH
• https://github.com/wanghaiwei/xiuno-docker/issues/4
• https://gitee.com/xiuno/xiunobbs/issues/I16BHH
• https://github.com/wanghaiwei/xiuno-docker/issues/4

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