CVE-2021-34357: qnap systems inc. qmailagent Cross-site Scripting
CVSS: 6.9v3.1MediumModified
Published 13-11-2021Last modified 17-09-2024
Vulnerability summary
CVE-2021-34357 is a medium (CVSS 6.9) Cross-site Scripting vulnerability in qnap systems inc. qmailagent. EPSS estimates a 0.71% chance of exploitation in the next 30 days, higher than 52.9% of scored vulnerabilities.
CVSS score
6.9/10
010
Medium · v3.1 (CVE.org)EPSS score
0.71%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 13-11-2021PublishedVulnerability first disclosed.
- 17-09-2024Last modifiedVulnerability information updated.
Description
A cross-site scripting (XSS) vulnerability has been reported to affect QNAP device running QmailAgent. If exploited, this vulnerability allows remote attackers to inject malicious code. We have already fixed this vulnerability in the following versions of QmailAgent: QmailAgent 3.0.2 ( 2021/08/25 ) and later
CVSS metrics
3 scores · 2 sources · 2 versionsMedium 6.9Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:NSources2 sources · 6.1–6.9
- NVDNIST6.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NDiffers
Medium 4.3Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:N/I:P/A:NSourcesSingle source
EPSS trend
Probability
0.71%
Chance of exploitation in the next 30 days
Percentile
53%
Versus all other CVEs
30-day change
0.00 pp
From 0.71% on 21-09-2026
21-09-202621-10-2026
EPSS score0.71%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Qnap1 product
- qmailagent< 3.0.2
Qnap systems inc.1 product
- qmailagent≥ unspecified, < 3.0.2 ( 2021/08/25 )
2 vendors · 2 products