CVE-2021-3355
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.
Does this matter?
A public exploit is published in Exploit-DB, so the technical barrier is gone even though the severity is medium and EPSS is 7.2%. Treat it as high on anything reachable from the internet.
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
- 5.4 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 7.25% probability · 94th percentile
- Public exploits
- 1 in Exploit-DB · first 26 February 2021
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- lightcms project/lightcms
- Source
- cve@mitre.org
EPSS 7.2% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://packetstormsecurity.com/files/161562/LightCMS-1.3.4-Cross-Site-Scripting.htmlExploit, Third Party Advisory, VDB Entry
- https://gist.github.com/Peithon/1c628ded0c4fc96c6331c3cce1d0c69bExploit, Third Party Advisory
- https://github.com/eddy8/LightCMS/issues/18Exploit, Issue Tracking, Third Party Advisory
- https://www.exploit-db.com/exploits/49598Exploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/161562/LightCMS-1.3.4-Cross-Site-Scripting.htmlExploit, Third Party Advisory, VDB Entry
- https://gist.github.com/Peithon/1c628ded0c4fc96c6331c3cce1d0c69bExploit, Third Party Advisory
- https://github.com/eddy8/LightCMS/issues/18Exploit, Issue Tracking, Third Party Advisory
- https://www.exploit-db.com/exploits/49598Exploit, Third Party Advisory, VDB Entry
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.