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Vulnerability record · CVE-2021-3355 · published 24 February 2021

CVE-2021-3355: Lightcms project lightcms cross-site scripting vulnerability

Lightcms Project · Lightcms

A stored-self XSS exists in LightCMS v1.3.4, allowing an attacker to execute HTML or JavaScript code in a vulnerable Title field to /admin/SensitiveWords.

5.4 CVSS 3.1 Medium EPSS 7.2% · top 5.9% CWE-79 · Cross-site scripting
5.4CVSS 3.1 base score, v2 3.5
7.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References, 8 tagged exploit
17 Jun 2026Last modified by NVD

Description

A stored-self XSS exists in LightCMS v1.3.4, allowing an attacker to execute HTML or JavaScript code in a vulnerable Title field to /admin/SensitiveWords.

CVSS:3.1/AV:N/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
http://packetstormsecurity.com/files/161562/LightCMS-1.3.4-Cross-Site-Scripting.html ExploitThird Party AdvisoryVDB Entry
https://gist.github.com/Peithon/1c628ded0c4fc96c6331c3cce1d0c69b ExploitThird Party Advisory
https://github.com/eddy8/LightCMS/issues/18 ExploitIssue TrackingThird Party Advisory
https://www.exploit-db.com/exploits/49598 ExploitThird Party AdvisoryVDB Entry
http://packetstormsecurity.com/files/161562/LightCMS-1.3.4-Cross-Site-Scripting.html ExploitThird Party AdvisoryVDB Entry
https://gist.github.com/Peithon/1c628ded0c4fc96c6331c3cce1d0c69b ExploitThird Party Advisory
https://github.com/eddy8/LightCMS/issues/18 ExploitIssue TrackingThird Party Advisory
https://www.exploit-db.com/exploits/49598 ExploitThird Party AdvisoryVDB Entry

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-3355), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.