dbcve.org
Web Help DeskApplication · Solarwinds

CVE-2021-35243

HIGH · 7.5 CVSS v3.1 Published 2021-12-23
Fix available
A fix is available. Upgrade to after 12.7.7 or later.
See remediation →
84/100
Remediation priority · High
Remotely reachable No privileges Zero-click

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 · unedited
The HTTP PUT and DELETE methods were enabled in the Web Help Desk web server (12.7.7 and earlier), allowing users to execute dangerous HTTP requests. The HTTP PUT method is normally used to upload data that is saved on the server with a user-supplied URL. While the DELETE method requests that the origin server removes the association between the target resource and its current functionality. Improper use of these methods may lead to a loss of integrity.

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 confidence

The Web Help Desk (12.7.7 and earlier) web server had HTTP PUT and DELETE methods enabled, which should typically be disabled. PUT allows attackers to upload arbitrary files to the server while DELETE can remove resources, leading to potential integrity compromise.

MitigationDisable HTTP PUT and DELETE methods in the web server (e.g., IIS, Apache, or embedded server) configuration to prevent unauthorized file uploads or resource deletion.

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
Web Help DeskApplication
Affected:<= 12.7.7

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
High
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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 checks

Work through these to decide whether this CVE applies to you.

  1. Identify Web Help Desk installation
    Locate the SolarWinds Web Help Desk installation directory and check the version information file, typically found in the application directory or via the application's About/Help section
    Affected if Version is 12.7.7 or lower (or if the version cannot be determined but the product is installed)
  2. Verify HTTP methods are enabled
    Send HTTP OPTIONS request to the Web Help Desk server or inspect the web server (IIS, Apache, or embedded server) configuration to list allowed HTTP methods
    Affected if HTTP PUT method is listed as allowed/enabled
  3. Verify DELETE method is enabled
    Inspect the same web server configuration used in the previous step to confirm DELETE method is also enabled
    Affected if HTTP DELETE method is listed as allowed/enabled

If Web Help Desk version 12.7.7 or lower is installed AND both HTTP PUT and DELETE methods are enabled on the server, the environment is affected by this vulnerability.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 · scoped
Upgrade available Upgrade to a release after 12.7.7
Interim mitigation

Disable HTTP PUT and DELETE methods in the web server (e.g., IIS, Apache, or embedded server) configuration to prevent unauthorized file uploads or resource deletion.

Recommended fix Moderate confidence

Web Help Desk version newer than 12.7.7 (contact SolarWinds support for exact fixed release)

  1. Contact SolarWinds support or visit the official SolarWinds support portal to obtain the latest stable version of Web Help Desk that addresses CVE-2021-35243
  2. Review the upgrade documentation provided by SolarWinds for Web Help Desk
  3. Plan the upgrade process, including backing up the current Web Help Desk configuration and database
  4. Schedule a maintenance window to perform the upgrade
  5. Execute the upgrade following the official SolarWinds upgrade procedures
  6. Verify that the HTTP PUT and DELETE methods are now disabled or properly restricted after the upgrade
  7. Test the Web Help Desk functionality to ensure normal operations
Caveat Review release notes for any configuration or feature changes between 12.7.7 and the target upgrade version

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Web Help Desk Scoped from the published advisory
  • Consultation1.0 h
  • Implementation1.0 h
  • Testing2.0 h
  • Review / QA1.0 h
5.0 hours of engineering $860
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,376.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2021-35243 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • 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
  • No spam, self-promotion, credentials, or personal data