CVE-2026-48209
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 improper neutralization of user-controllable input in OTRS or ((OTRS)) Community Edition ticket handling allows authenticated attackers to perform reflected cross-site scripting (XSS) attacks via crafted request parameters associated with ticket actions. By injecting malicious JavaScript into manipulated request URLs, attackers can execute arbitrary script code in the context of an authenticated agent session when the crafted link is opened. This issue affects OTRS: * 7.0.x Please note that ((OTRS)) Community Edition 6.x and before are vulnerable. Products based on the ((OTRS)) Community Edition also very likely to be affected
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 · high confidenceA reflected cross-site scripting (XSS) vulnerability in OTRS ticket handling allows authenticated attackers to inject malicious JavaScript through crafted request parameters in ticket action URLs, executing code within the context of an authenticated agent session.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data<= 6.0.32>= 7.0.0, <= 7.0.49CVSS 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
- Required
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- High
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N
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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Determine installed OTRS versionAccess the admin dashboard or check the version file (Kernel/Config.pm or about page in OTRS web interface). The version is typically visible in the admin panel under 'System Administration' or by accessing /otrs/index.pl?Action=AdminSystemConfiguration.Affected if Installed version is <= 6.0.32 OR (installed version >= 7.0.0 AND <= 7.0.49)
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Verify agent authentication is enabledConfirm that OTRS agent login is active by checking if /otrs/index.pl?Action=Login loads and functional agent accounts exist in the system.Affected if Agent authentication is enabled and users can log in to the OTRS interface
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Identify accessible ticket action modulesCheck which ticket action modules are active for agent accounts. In OTRS, ticket actions are controlled via 'Process Management' and 'Ticket ACLs' in admin settings. Navigate to a ticket and inspect available action buttons (e.g., Close, PriorityChange, OwnerChange).Affected if Agent has access to ticket action functionality in the web interface
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Inspect ticket action URL parametersWhen viewing a ticket, click on an action (like Priority Change or Owner Change) and examine the generated URL in the browser address bar. Look for parameter values that could be reflected back in the page without encoding, such as parameter values containing special characters like <, >, ', or ".Affected if Ticket action URLs contain user-controllable parameters that get reflected in the response without proper encoding
A user is affected if they run OTRS version 6.0.32 or earlier, or version 7.0.0 through 7.0.49, and have agent accounts with access to ticket action functionality that handles URL parameters without proper output encoding.
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.
dbcve · scopedApply vendor patches for OTRS 7.0.x or upgrade to a patched version; in the interim, instruct agents to avoid clicking untrusted links to OTRS ticket action URLs.
OTRS 7.0.50 or later (or Znuny 7.0.50+ as OTRS is now Znuny); OTRS 6.0.x to latest 6.0.x
- Check the current OTRS version by navigating to the Admin panel > System Administration > System Information
- Back up the OTRS database and configuration files before upgrading
- Download the latest OTRS 7.0.x package (7.0.50 or later) or OTRS 6.0.x package from the official OTRS website or Znuny (since OTRS is now Znuny)
- Stop the OTRS services (apache/web server and OTRS daemon)
- Extract and install the new version following the upgrade instructions in the OTRS Admin Manual
- Run the migration script: perl bin/otrs.Console.pl Maint::Database::Upgrade
- Clear the cache: perl bin/otrs.Console.pl Maint::Cache::Delete
- Start the OTRS services
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation6.0 h
- Implementation12.0 h
- Testing8.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-48209 — 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-2026-48209 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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- Version or environment caveats, and links to real fixes
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