CVE-2021-21515
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 · uneditedDell EMC SourceOne, versions 7.2SP10 and prior, contain a Stored Cross-Site Scripting vulnerability. A remote low privileged attacker may potentially exploit this vulnerability, to hijack user sessions or to trick a victim application user to unknowingly send arbitrary requests to the server.
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 · moderate confidenceDell EMC SourceOne versions 7.2SP10 and prior contain a stored cross-site scripting (XSS) vulnerability. A remote low-privileged attacker can inject malicious JavaScript payloads that are persisted on the server. When other users subsequently view the affected content, the injected script executes in their browsers, potentially allowing session hijacking or tricking users into unknowingly sending arbitrary requests to the server.
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< 7.2= 7.2CVSS 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 the Dell EMC SourceOne versionLocate the installed version of Dell EMC SourceOne in the system documentation, about page, or version information within the application. This is typically accessible through the administration console or installation logs.Affected if The installed version is 7.2SP10 or any version prior to 7.2SP10, or matches the pattern < 7.2 or = 7.2 as specified in the affected versions.
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Confirm web interface is enabledVerify that the SourceOne web-based administration or user interface is accessible and enabled. This is required for the XSS to be exploitable.Affected if The web interface is exposed and users can access web pages served by SourceOne.
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Identify user input points in the web interfaceReview the SourceOne web application for areas where user-supplied data is stored and rendered back to users, such as configuration fields, search parameters, or content submission forms.Affected if User-controllable input fields exist that persist data and display it to other users in web pages.
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Check for existing XSS payloadsExamine any user-created content or configuration entries in the SourceOne database or configuration files for suspicious script tags, event handlers, or JavaScript code that may indicate prior exploitation.Affected if Unexpected HTML or script tags are found in stored user data that were not intentionally added by administrators.
A user is affected if their installed Dell EMC SourceOne version is 7.2SP10 or prior, the web interface is enabled, and user-supplied data can be persisted and rendered in web pages without proper 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.
From vendor data7.2
Implement robust input validation and output encoding for all user-supplied data rendered in web pages. Apply the vendor patch when available, or implement a Web Application Firewall (WAF) as an interim control to detect and block XSS exploitation attempts.
- Consultation6.0 h
- Implementation12.0 h
- Testing6.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $7,968.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-21515 — 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-2021-21515 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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