What is CVE-2020-25799?

CVE-2020-25799 is a medium-severity vulnerability in Limesurvey, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2020-12-31.

How severe is CVE-2020-25799?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Limesurvey

CVE-2020-25799

LimeSurvey 3.21.1 is affected by cross-site scripting (XSS) in the Quota component of the Survey page. When the survey quota being viewed, e.g. by an administrative user, the JavaScript code will be executed in the browser.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2020-12-31 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.007 (51.5th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 51.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

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

Affected products

Limesurvey — versions 3.21.1

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

bugs.limesurvey.org/view.php (Exploit, Vendor Advisory)
github.com/LimeSurvey/LimeSurvey/commit/a5f317817da4577d9ff457fea9c96482b3d1df23 (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2020-25799?: CVE-2020-25799 is a medium-severity vulnerability in Limesurvey, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2020-12-31.
How severe is CVE-2020-25799?: Medium severity. CVSS v3 base score is 5.4 out of 10.