CVE-2022-42786
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 · uneditedMultiple W&T Products of the ComServer Series are prone to an XSS attack. An authenticated remote Attacker can execute arbitrary web scripts or HTML via a crafted payload injected into the title of the configuration webpage
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 confidenceThis is a stored Cross-Site Scripting (XSS) vulnerability in W&T ComServer Series devices. An authenticated attacker can inject malicious JavaScript or HTML code into the 'title' field of the configuration webpage. When other users (including administrators) view the configuration page, the injected payload executes in their browser context, potentially allowing session hijacking, credential theft, or further network compromise.
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< 1.48< 1.48< 1.48< 1.76< 1.76< 1.76< 1.76< 1.76CVSS 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
- Low
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/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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Identify device model and firmware versionAccess the device web interface or use SNMP to retrieve the firmware version. Look for a status, system info, or about page that displays the current firmware version.Affected if The firmware version is less than 1.48 for Com Server ++, At Modem Emulator, or 20ma models, or less than 1.76 for Highspeed models.
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Confirm web interface is enabledVerify the device HTTP/HTTPS service is listening. Use a port scan (e.g., nmap) or check the device network settings to confirm the web management interface is active.Affected if The web interface is accessible and the firmware version is in the affected range.
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Verify authentication is requiredCheck if the configuration pages require login. Attempt to access the title configuration field without credentials or check the authentication settings in the device admin panel.Affected if The device allows unauthenticated access to the configuration page title field, or uses default/weak credentials.
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Inspect the title field for unsanitized inputLog into the device as an administrator and navigate to the configuration page where the title field is defined. View the page source or intercept the HTTP response to check if the title value is rendered without encoding.Affected if The title field content is reflected directly in HTML without encoding special characters (<, >, ", ', &).
The device is affected if it runs a firmware version below 1.48 (or 1.76 for Highspeed models) and has the web interface accessible with the title configuration field present and improperly sanitized.
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 · scoped1.481.76
Implement strict input validation and output encoding on the configuration page title field. The web application should sanitize or reject special HTML characters (<, >, ", ', &, javascript: URLs) before storing and rendering this field. Apply the fix via firmware update from the vendor.
Firmware version 1.48 for Modem Emulator/Com Server ++/Com Server 20ma; Firmware version 1.76 for Com Server Highspeed variants
- Identify the specific ComServer model from the affected product list
- For Modem Emulator, Com Server ++, or Com Server 20ma devices: upgrade firmware to version 1.48 or later
- For Com Server Highspeed variants (100basefx, 100baselx, 19" 1port, 19" 4port, Compact): upgrade firmware to version 1.76 or later
- Download firmware updates from the official W&T website or through the vendor's support channels
- Follow the vendor's standard firmware update procedure (typically via web interface or TFTP)
- After upgrade, verify the XSS vulnerability is remediated by testing that the title field properly sanitizes input
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation3.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2022-42786 — 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-2022-42786 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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