CVE-2024-12755
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 · uneditedA Cross-Site Scripting (XSS) vulnerability in Avaya Spaces may have allowed unauthorized code execution and potential disclose of sensitive information.
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 confidenceA cross-site scripting (XSS) vulnerability in Avaya Spaces allows attackers to inject malicious scripts through unsanitized user inputs. When other users view the injected content, the script executes in their browsers, potentially enabling session hijacking, credential theft, or unauthorized actions on behalf of authenticated users.
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 dataall versionsCVSS 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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Confirm Avaya Spaces deploymentIdentify if Avaya Spaces is installed in your environment by checking for the application running on expected ports (typically 443/https) or by reviewing installed software inventoryAffected if Avaya Spaces is accessible and running in your environment
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Identify user input fieldsLocate all user-controllable input areas in Avaya Spaces such as message fields, post content areas, comment boxes, user profile fields, file names, or any text input that gets stored and displayed to other usersAffected if User input fields exist that accept and store content for later display to other users
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Test input reflection without encodingSubmit a benign test payload such as <script>alert('XSS')</script> or <img src=x onerror=alert(1)> into identified input fields, then view that content as a different user to see if the script executesAffected if The submitted payload is reflected and executes in the browser when viewed by other users, indicating lack of output encoding
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Verify output encoding is missingInspect the HTTP response or page source when viewing submitted content; check if special characters like < > " ' are being encoded to HTML entities (e.g., < > ") or remain as raw charactersAffected if Special characters in user content are not being encoded before output, allowing script injection
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Check for absence of CSP headersInspect HTTP response headers from Avaya Spaces for Content-Security-Policy header; if absent or weak, XSS impact is higherAffected if CSP headers are missing or insufficiently configured, providing no defense-in-depth against XSS exploitation
Your environment is affected if Avaya Spaces is running and user-supplied content is reflected to other users without proper output encoding, allowing script execution in their browsers.
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 dataImplement context-aware output encoding and input validation across all user-controllable fields in Avaya Spaces; deploy Content Security Policy (CSP) headers to mitigate XSS impact; audit and patch the vulnerable code paths identified in the affected version.
- Consultation8.0 h
- Implementation16.0 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-2024-12755 — 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-2024-12755 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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