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Vulnerability record · CVE-2020-5519 · published 6 January 2020

CVE-2020-5519: Litespeedtech openlitespeed improper input validation vulnerability

Litespeedtech · Openlitespeed

The WebAdmin Console in OpenLiteSpeed before v1.6.5 does not strictly check request URLs, as demonstrated by the "Server Configuration > External App" screen.

9.8 CVSS 3.1 Critical EPSS 1.2% · top 33.1% CWE-20 · Improper input validation
9.8CVSS 3.1 base score, v2 7.5
1.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

The WebAdmin Console in OpenLiteSpeed before v1.6.5 does not strictly check request URLs, as demonstrated by the "Server Configuration > External App" screen.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://drive.google.com/open?id=1pSciFEfjHp3kN8y5shy_zosJo7dje_fX Permissions RequiredThird Party Advisory
https://forum.openlitespeed.org/threads/openlitespeed-v1-6-5-now-available.4047/ Vendor Advisory
https://drive.google.com/open?id=1pSciFEfjHp3kN8y5shy_zosJo7dje_fX Permissions RequiredThird Party Advisory
https://forum.openlitespeed.org/threads/openlitespeed-v1-6-5-now-available.4047/ Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2020-5519), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.