High
Security advisory
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2021-33900
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 04:35 UTC · Revision 1
Source evidence
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.
osv:CVE-2021-33900
Complete source record
{
"id": "f24d6171f5221652db55aea4a723872bc88e12e4dac66f83336e496e047f6f17",
"url": "https://osv.dev/vulnerability/CVE-2021-33900",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2021-33900",
"summary": "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.",
"evidence": "osv:CVE-2021-33900",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2021-33900",
"aliases": [
"CVE-2021-33900",
"GHSA-4x25-f45x-grv5"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/apache/directory-studio",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"last_affected": "f8bd39ad32780a5ed629debddba1f99d84da9ef0"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:apache:directory_studio:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"last_affected": "1.5.3"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"1.5.3.v20100330"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-33900.json"
}
}
],
"modified": "2026-10-24T10:30:20.528601689Z",
"provider": "osv",
"references": [
"https://lists.apache.org/thread.html/rb1dbcc43a5b406e45d335343a1704f4233de613140a01929d102fdc9%40%3Cusers.directory.apache.org%3E"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:a:apache:directory_studio:2.0.0:milestone10:*:*:*:*:*:*",
"cpe:2.3:a:apache:directory_studio:2.0.0:milestone11:*:*:*:*:*:*",
"cpe:2.3:a:apache:directory_studio:2.0.0:milestone12:*:*:*:*:*:*",
"cpe:2.3:a:apache:directory_studio:2.0.0:milestone13:*:*:*:*:*:*",
"cpe:2.3:a:apache:directory_studio:2.0.0:milestone14:*:*:*:*:*:*",
"cpe:2.3:a:apache:directory_studio:2.0.0:milestone15:*:*:*:*:*:*",
"cpe:2.3:a:apache:directory_studio:2.0.0:milestone16:*:*:*:*:*:*",
"cpe:2.3:a:apache:directory_studio:2.0.0:milestone1:*:*:*:*:*:*",
"cpe:2.3:a:apache:directory_studio:2.0.0:milestone2:*:*:*:*:*:*",
"cpe:2.3:a:apache:directory_studio:2.0.0:milestone3:*:*:*:*:*:*",
"cpe:2.3:a:apache:directory_studio:2.0.0:milestone4:*:*:*:*:*:*",
"cpe:2.3:a:apache:directory_studio:2.0.0:milestone5:*:*:*:*:*:*",
"cpe:2.3:a:apache:directory_studio:2.0.0:milestone6:*:*:*:*:*:*",
"cpe:2.3:a:apache:directory_studio:2.0.0:milestone7:*:*:*:*:*:*",
"cpe:2.3:a:apache:directory_studio:2.0.0:milestone8:*:*:*:*:*:*",
"cpe:2.3:a:apache:directory_studio:2.0.0:milestone9:*:*:*:*:*:*"
],
"vendor_product": "apache:directory_studio",
"extracted_events": [
{
"range": [
{
"introduced": "2.0.0-milestone1"
},
{
"last_affected": "2.0.0-milestone1"
},
{
"introduced": "2.0.0-milestone10"
},
{
"last_affected": "2.0.0-milestone10"
},
{
"introduced": "2.0.0-milestone11"
},
{
"last_affected": "2.0.0-milestone11"
},
{
"introduced": "2.0.0-milestone12"
},
{
"last_affected": "2.0.0-milestone12"
},
{
"introduced": "2.0.0-milestone13"
},
{
"last_affected": "2.0.0-milestone13"
},
{
"introduced": "2.0.0-milestone14"
},
{
"last_affected": "2.0.0-milestone14"
},
{
"introduced": "2.0.0-milestone15"
},
{
"last_affected": "2.0.0-milestone15"
},
{
"introduced": "2.0.0-milestone16"
},
{
"last_affected": "2.0.0-milestone16"
},
{
"introduced": "2.0.0-milestone2"
},
{
"last_affected": "2.0.0-milestone2"
},
{
"introduced": "2.0.0-milestone3"
},
{
"last_affected": "2.0.0-milestone3"
},
{
"introduced": "2.0.0-milestone4"
},
{
"last_affected": "2.0.0-milestone4"
},
{
"introduced": "2.0.0-milestone5"
},
{
"last_affected": "2.0.0-milestone5"
},
{
"introduced": "2.0.0-milestone6"
},
{
"last_affected": "2.0.0-milestone6"
},
{
"introduced": "2.0.0-milestone7"
},
{
"last_affected": "2.0.0-milestone7"
},
{
"introduced": "2.0.0-milestone8"
},
{
"last_affected": "2.0.0-milestone8"
},
{
"introduced": "2.0.0-milestone9"
},
{
"last_affected": "2.0.0-milestone9"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2021-33900",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 430295,
"published_at": "2021-07-26T07:15:07.183+00:00"
}