What is CVE-2020-26563?

CVE-2020-26563 is a medium-severity vulnerability in Objectplanet Opinio, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-07-30.

How severe is CVE-2020-26563?

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

Is CVE-2020-26563 known to be exploited?

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

XSS in Objectplanet Opinio

CVE-2020-26563

ObjectPlanet Opinio before 7.14 allows reflected XSS via the survey/admin/surveyAdmin.do?action=viewSurveyAdmin query string. (There is also stored XSS if input to survey/admin/*.do is accepted from untrusted users.)

Vulnerability class: XSS (Cross-Site Scripting)

Published 2021-07-30 · 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: 0.010 (62.0th percentile), scored 2026-10-24.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 62nd percentile — 62.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Objectplanet Opinio

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

ARPSyndicate/cvemon

References

packetstormsecurity.com/files/163699/ObjectPlanet-Opinio-7.12-Cross-Site-Script… (Exploit, VDB Entry, Third Party Advisory)
www.objectplanet.com/opinio/changelog.html (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2020-26563?: CVE-2020-26563 is a medium-severity vulnerability in Objectplanet Opinio, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-07-30.
How severe is CVE-2020-26563?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2020-26563 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.