How severe is CVE-2020-25797?

CVE-2020-25797 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2020-25797 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-25797?

CVE-2020-25797 affects Limesurvey. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-25797?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-25797 published?

CVE-2020-25797 was published on 2020-12-31 and last updated on 2026-06-17.

CVE-2020-25797

CVE-2020-25797 is a medium-severity vulnerability in Limesurvey with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
CVSS v2: 3.5
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Limesurvey
Published: 2020-12-31
Last modified: 2026-06-17

Description

LimeSurvey 3.21.1 is affected by cross-site scripting (XSS) in the Add Participants Function (First and last name parameters). When the survey participant being edited, e.g. by an administrative user, the JavaScript code will be executed in the browser.

Frequently asked questions

What is CVE-2020-25797?: LimeSurvey 3.21.1 is affected by cross-site scripting (XSS) in the Add Participants Function (First and last name parameters). When the survey participant being edited, e.g. by an administrative user, the JavaScript code will be executed in the browser.
How severe is CVE-2020-25797?: CVE-2020-25797 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2020-25797 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-25797?: CVE-2020-25797 affects Limesurvey. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-25797?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-25797 published?: CVE-2020-25797 was published on 2020-12-31 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:limesurvey:limesurvey:3.21.1:*:*:*:*:*:*:*

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