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Vulnerability record · CVE-2021-25987 · published 30 November 2021

CVE-2021-25987: Hexo cross-site scripting vulnerability

Hexo · Hexo

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.

4.6 CVSS 3.1 Medium EPSS 0.34% · top 75.2% CWE-79 · Cross-site scripting
4.6CVSS 3.1 base score, v2 1.9
0.34%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/hexojs/hexo/commit/5170df2d3fa9c69e855c4b7c2b084ebfd92d5200 PatchThird Party Advisory
https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25987 Third Party Advisory
https://github.com/hexojs/hexo/commit/5170df2d3fa9c69e855c4b7c2b084ebfd92d5200 PatchThird Party Advisory
https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25987 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2021-25987), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.