Vulnerability from bitnami_vulndb
Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, authenticated users can submit crafted payloads to /drafts.json that cause O(n^2) processing in Base62.decode, tying up workers for 35-60 seconds per request. This affects all users as the shared worker pool becomes exhausted. This issue is patched in versions 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0. Lowering the max_draft_length site setting reduces attack surface but does not fully mitigate the issue, as payloads under the limit can still trigger the slow code path.
{
"affected": [
{
"package": {
"ecosystem": "Bitnami",
"name": "discourse",
"purl": "pkg:bitnami/discourse"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.5.4"
},
{
"introduced": "2025.11.0"
},
{
"fixed": "2025.11.2"
},
{
"introduced": "2025.12.0"
},
{
"fixed": "2026.1.0"
}
],
"type": "SEMVER"
}
],
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
],
"aliases": [
"CVE-2025-68934"
],
"database_specific": {
"cpes": [
"cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:*"
],
"severity": "Medium"
},
"details": "Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, authenticated users can submit crafted payloads to /drafts.json that cause O(n^2) processing in Base62.decode, tying up workers for 35-60 seconds per request. This affects all users as the shared worker pool becomes exhausted. This issue is patched in versions 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0. Lowering the max_draft_length site setting reduces attack surface but does not fully mitigate the issue, as payloads under the limit can still trigger the slow code path.",
"id": "BIT-discourse-2025-68934",
"modified": "2026-09-08T08:34:36.952Z",
"published": "2026-02-02T08:42:23.259Z",
"references": [
{
"type": "ADVISORY",
"url": "https://github.com/discourse/discourse/security/advisories/GHSA-vwjh-vrx9-9849"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-68934"
}
],
"schema_version": "1.6.2",
"summary": "Discourse Has Denial of Service (DoS) Vulnerability in Drafts Creation Endpoint"
}
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.