CVE-2021-35247 - CVE House
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Status published Medium CVE-2021-35247

Improper Input Validation Vulnerability in Serv-U

Vulnerability Description

Serv-U web login screen to LDAP authentication was allowing characters that were not sufficiently sanitized. SolarWinds has updated the input mechanism to perform additional validation and sanitization. Please Note: No downstream affect has been detected as the LDAP servers ignored improper characters. To insure proper input validation is completed in all environments. SolarWinds recommends scheduling an update to the latest version of Serv-U.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • SolarWinds would like to thank Jonathan Bar Or of Microsoft (@yo_yo_yo_jbo) for reporting this vulnerability

Affected Vendor

Affected Software

Serv-U
Vulnerable Versions:
15.2.5 and previous versions

Timeline

Official Publish: January 7th, 2022
Last Modified: October 21st, 2025
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Weaknesses (CWE)