CVE-2020-13820Extreme Management Center 8.4.1.24 allows unauthenticated reflected XSS via a parameter in a GET request.
- 6.1MediumCVSS base score
- 4.2%Exploitation in 30 daysEPSS · top 8.9% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- 1Public exploitsMetasploit, Nuclei and Exploit-DB
Description
Extreme Management Center 8.4.1.24 allows unauthenticated reflected XSS via a parameter in a GET request.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. The public collections list a Nuclei template for it.
Show the exploits1
Nuclei templates1 template
- Extreme Management Center 8.4.1.24 - Cross-Site Scripting (Nuclei template) (opens in a new tab)
http/cves/2020/CVE-2020-13820.yamlSeverity medium
Modules, templates and exploits as listed by the Metasploit Framework (BSD-3-Clause), ProjectDiscovery's Nuclei templates (MIT) and the Exploit Database (GPLv2), read once a day. Where the data comes from
Timeline
ID reserved
By mitre
- 2 months later
· 2 months later
Published
- 4 years later
· 4 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
- EPSS (exploitation in 30 days)
- 4.2% · top 8.9% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.1.
Affected products
n/a
- affected n/a
References
References4
- https://gtacknowledge.extremenetworks.com (opens in a new tab)x_refsource_MISCx_transferred
- https://gtacknowledge.extremenetworks.com/articles/Solution/000051136 (opens in a new tab)x_refsource_MISCx_transferred
- https://documentation.extremenetworks.com/release_notes/netsight/XMC_8.5.0_Release_Notes.pdf (opens in a new tab)x_refsource_MISCx_transferred
- https://medium.com/%400x00crash/xss-reflected-in-extreme-management-center-8-4-1-24-cve-2020-13820-c6febe951219 (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2020-6035 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2020-13820)Record last updated .