CVE-2025-61020
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedAn issue in the sqlo_strip_in_join component of openlink virtuoso-opensource v7.2.11 allows attackers to cause a Denial of Service (DoS) via crafted SQL statements.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · low confidenceA denial-of-service vulnerability exists in the sqlo_strip_in_join component of OpenLink Virtuoso Open-Source v7.2.11. Attackers can trigger the DoS by submitting specially crafted SQL statements to the component, causing the database server to become unresponsive or crash.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify installed Virtuoso versionCheck the installed version of virtuoso-opensource using package manager (dpkg -l | grep virtuoso, rpm -qa | grep virtuoso) or by querying the server version via ISQL: 'status();' command connected to the instanceAffected if The installed version is v7.2.11 or earlier unpatched versions of the v7.2.x line
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Verify SQL service is runningCheck if the Virtuoso SQL service process is active: 'ps aux | grep virtuoso' or check listening ports (default 1111 for conductor, 8890 for public SQL) using 'netstat -tlnp | grep -E "1111|8890"'Affected if The SQL service is running and accepting connections on any port
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Confirm network exposure of SQL interfaceReview firewall rules (iptables -L, ufw status) and Virtuoso configuration (INI files in /etc/virtuoso/ or /var/lib/virtuoso/) to determine if the SQL ports (1111, 8890) are bound to 0.0.0.0 or accessible from non-localhost interfacesAffected if SQL ports are bound to 0.0.0.0 or network-accessible IPs without restrictive ACLs
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Check for untrusted access vectorsExamine /etc/virtuoso/virtuoso.ini or instance INI file for [URIQA] and [HTTPServer] sections, and verify that allowed_hosts or similar ACL directives do not permit untrusted source IP addressesAffected if The SQL interface permits connections from IP addresses outside trusted management networks
A user is affected if running Virtuoso Open-Source Edition v7.2.11 (or earlier unpatched v7.2.x versions) with the SQL service network-accessible to untrusted sources.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataApply the vendor patch for CVE-2025-61020 when available. As a temporary mitigation, restrict SQL statement execution to trusted users or networks to limit exposure to crafted queries.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-61020 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2025-61020 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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