What is CVE-2021-35247?

CVE-2021-35247 is a medium-severity vulnerability in Solarwinds Serv-u, classified under Improper Input Validation. CVSS score: 4.3/10. Published 2022-01-07.

How severe is CVE-2021-35247?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Is CVE-2021-35247 known to be exploited?

Yes. CVE-2021-35247 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-01-21), indicating it is being actively exploited. 5 public proof-of-concept repositories are indexed.

Improper input validation in Solarwinds Serv-u

CVE-2021-35247

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 ha…

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.053 (90.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.

Affected products

Solarwinds Serv-u — versions 15.2.5 and previous versions

Weakness classification (CWE)

CWE-20 — Improper Input Validation

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2022-01-21. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2022-02-04.

Required action: Apply updates per vendor instructions.

Public proof-of-concept exploits

References

www.solarwinds.com/trust-center/security-advisories/cve-2021-35247 (x_refsource_MISC)
documentation.solarwinds.com/en/success_center/servu/content/release_notes/serv… (x_refsource_MISC)

Frequently asked questions

What is CVE-2021-35247?: CVE-2021-35247 is a medium-severity vulnerability in Solarwinds Serv-u, classified under Improper Input Validation. CVSS score: 4.3/10. Published 2022-01-07.
How severe is CVE-2021-35247?: Medium severity. CVSS v3 base score is 4.3 out of 10.
Is CVE-2021-35247 known to be exploited?: Yes. CVE-2021-35247 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-01-21), indicating it is being actively exploited. 5 public proof-of-concept repositories are indexed.