XSS in Accellion Fta

CVE-2021-27731

Accellion FTA 9_12_432 and earlier is affected by stored XSS via a crafted POST request to a user endpoint. The fixed version is FTA_9_12_444 and later.

Vulnerability class: XSS (Cross-Site Scripting)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.007 (52.1th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 52.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2021-27731: held from 0.007 to 0.007.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2021-27731?
CVE-2021-27731 is a medium-severity vulnerability in Accellion Fta, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-03-02.
How severe is CVE-2021-27731?
Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2021-27731 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.