CVE-2021-33900: Apache Directory Studio

High severity, CVSS 7.5. EPSS: 0.8% chance of exploitation in the next 30 days.

While investigating DIRSTUDIO-1219 it was noticed that configured StartTLS encryption was not applied when any SASL authentication mechanism (DIGEST-MD5, GSSAPI) was used. While investigating DIRSTUDIO-1220 it was noticed that any configured SASL confidentiality layer was not applied. This issue affects Apache Directory Studio version 2.0.0.v20210213-M16 and prior versions.

Affected products

• Apache Directory Studio: up to and including 1.5.3; version 2.0.0 only

Published 2021-07-26. Last modified 2026-06-17.