myfactory.FMS before 7.1-912 allows XSS via the Error parameter.

published 2021-10-18 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-29534

cvss: 6.1; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 5.8%; EPSS 5.8% chance of exploitation in 30 days, percentile 93%
public exploits: 1; Exploit-DB, plus a Nuclei check

Patch / fix

fixed in 1

myfactory fms 7.1-912

Timeline

2021-10-18 Published
2021-10-19 First public exploit (EDB-50428)

Exploit prediction

5.83% chance of exploitation in the next 30 days, higher than 93% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

EDB-50428 myfactory FMS 7.1-911 - 'Multiple' Reflected Cross-Site Scripting (XSS) webapps, 2021-10-19
Nuclei template myfactory FMS - Cross-Site Scripting nuclei detection template
redteam-pentesting.de https://www.redteam-pentesting.de/advisories/rt-sa-2021-001 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:N/I:P/A:N

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

redteam-pentesting.de /advisories/rt-sa-2021-001
exploit, third-party-advisory

Sources

CVE List CVE-2021-42566
NVD CVE-2021-42566

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