What is CVE-2020-35650?

CVE-2020-35650 is a medium-severity vulnerability in Uncannyowl Uncanny Groups For Learndash, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-12-23.

How severe is CVE-2020-35650?

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

XSS in Uncannyowl Uncanny Groups For Learndash

CVE-2020-35650

Multiple cross-site scripting (XSS) vulnerabilities in Uncanny Groups for LearnDash before v3.7 allow authenticated remote attackers to inject arbitrary JavaScript or HTML via the ulgm_code_redeem POST Parameter in user-code-redemption.php, the ulgm_user_first POST Parameter in user-registration-form.php, the ulgm_user_last POST Parameter in user-registration-form.php, the ulgm_user_email POST Parameter in user-registration-form.php, the ulgm_code_registration POST Parameter in user-registration-form.php, the ulgm_terms_conditions POST Parameter in user-registration-form.php, the _ulgm_total_seats POST Parameter in frontend-uo_groups_buy_courses.php, the uncanny_group_signup_user_first POST Parameter in group-registration-form.php, the uncanny_group_signup_user_last POST Parameter in group-registration-form.php, the uncanny_group_signup_user_login POST Parameter in group-registration-form.php, the uncanny_group_signup_user_email POST Parameter in group-registration-form.php, the success-invited GET Parameter in frontend-uo_groups.php, the bulk-errors GET Parameter in frontend-uo_groups.php, or the message GET Parameter in frontend-uo_groups.php.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2020-12-23 · 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: 0.008 (54.2th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 54.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: +0.000

Affected products

Uncannyowl Uncanny Groups For Learndash

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.uncannyowl.com/knowledge-base/uncanny-learndash-groups-changelog/ (Release Notes, Vendor Advisory)
gist.github.com/michiiii/81d801f563138abe7da61e2d95342202 (Third Party Advisory)

Frequently asked questions

What is CVE-2020-35650?: CVE-2020-35650 is a medium-severity vulnerability in Uncannyowl Uncanny Groups For Learndash, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-12-23.
How severe is CVE-2020-35650?: Medium severity. CVSS v3 base score is 6.1 out of 10.