What’s Vulnerable › Vulnerabilities

CVE-2021-25987: Hexo - Stored XSS

• Severity: medium (CVSS 4.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-11-30 · updated 2026-06-17
• Weakness: CWE-79

Description

Hexo versions 0.0.1 to 5.4.0 are vulnerable against stored XSS. The post “body” and “tags” don’t sanitize malicious javascript during web page generation. Local unprivileged attacker can inject arbitrary code.

Affected products

• Hexo: from 0.0.1 through 5.4.0

References

• https://github.com/hexojs/hexo/commit/5170df2d3fa9c69e855c4b7c2b084ebfd92d5200
• https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25987
• https://github.com/hexojs/hexo/commit/5170df2d3fa9c69e855c4b7c2b084ebfd92d5200
• https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25987

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