An Authenticated Persistent XSS vulnerability was discovered in the Best Support System, tested version v3.0.4.

published 2020-09-04 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-17663

cvss: 5.4; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.9%; EPSS 1.9% chance of exploitation in 30 days, percentile 79%
public exploits: 1; Exploit-DB

Timeline

2020-09-04 Published
2020-11-27 First public exploit (EDB-49122)

Exploit prediction

1.85% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

EDB-49122 Best Support System 3.0.4 - 'ticket_body' Persistent XSS (Authenticated) webapps, 2020-11-27

CVSS scores

assigned by	version	score	vector
NVD	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
NVD	2.0	3.5	AV:N/AC:M/Au:S/C:N/I:P/A:N

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

CVE List CVE-2020-24963
NVD CVE-2020-24963

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary