What is CVE-2021-31738?

CVE-2021-31738 is a medium-severity vulnerability in Adiscon Loganalyzer, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-06-08.

How severe is CVE-2021-31738?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Is CVE-2021-31738 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Adiscon Loganalyzer

CVE-2021-31738

Adiscon LogAnalyzer 4.1.10 and 4.1.11 allow login.php XSS.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2021-06-08 · last modified 2026-06-17.

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: 0.009 (59.3th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 59.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Adiscon Loganalyzer — versions 4.1.10, 4.1.11

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2021-024.txt (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-31738?: CVE-2021-31738 is a medium-severity vulnerability in Adiscon Loganalyzer, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-06-08.
How severe is CVE-2021-31738?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2021-31738 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.