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Vulnerability record · CVE-2021-27731 · published 2 March 2021

CVE-2021-27731: Accellion fta cross-site scripting vulnerability

Accellion · Fta

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.

6.1 CVSS 3.1 Medium EPSS 0.72% · top 47.9% CWE-79 · Cross-site scripting
6.1CVSS 3.1 base score, v2 4.3
0.72%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/accellion/CVEs/blob/main/CVE-2021-27731.txt Third Party Advisory
https://github.com/accellion/CVEs/blob/main/CVE-2021-27731.txt Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2021-27101Accellion FTA SQL injection via crafted Host headerAccellion FTA 9_12_370 and earlier is affected by SQL injection through a crafted Host header in a request to document_root.html. The flaw is remotel…KEVEPSS 6.0%analysed9.8CVE-2021-27103Accellion FTA SSRF in wmProgressstat.htmlAccellion FTA 9_12_411 and earlier is vulnerable to server-side request forgery through a crafted POST request to wmProgressstat.html. The flaw is re…KEVEPSS 11%analysed9.8CVE-2021-27104Accellion FTA OS command injection in admin endpointsAccellion FTA 9_12_370 and earlier allows OS command execution through a crafted POST request to various admin endpoints. The flaw is an unauthentica…KEVEPSS 57%analysed7.8CVE-2021-27102Accellion FTA OS command injection via local web service callAccellion FTA 9_12_411 and earlier allows OS command execution through a local web service call, classified as CWE-78 command injection. The flaw is …KEVEPSS 3.7%analysed9.8CVE-2021-27730Accellion fta injection vulnerabilityAccellion FTA 9_12_432 and earlier is affected by argument injection via a crafted POST request to an admin endpoint. The fixed version is FTA_9_12_4…EPSS 1.4%6.1CVE-2026-42897Microsoft Exchange Server XSS enables spoofingMicrosoft Exchange Server and Exchange Server Subscription Edition fail to neutralize input during web page generation, a cross-site scripting flaw (…KEVEPSS 0.52%analysed6.1CVE-2025-48700Zimbra Classic UI stored XSS via crafted email HTMLZimbra Collaboration Suite Classic UI fails to properly sanitize HTML content in email messages, allowing crafted tag structures and attribute values…KEVEPSS 1.7%analysed6.1CVE-2025-66376Zimbra Collaboration Classic UI stored XSS via CSS @import in emailZimbra Collaboration Suite 10 before 10.0.18 and 10.1 before 10.1.13 allows stored cross-site scripting in the Classic UI through CSS @import directi…KEVEPSS 20%analysed

Source: NIST National Vulnerability Database (record CVE-2021-27731), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.