CVE-2026-57871
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 · uneditedRelative path traversal vulnerability in MicroRealEstate file upload functionality allows attackers to potentially overwrite system files. This issue affects MicroRealEstate: through 1.0.0-alpha3.
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 relative path traversal vulnerability in MicroRealEstate's file upload functionality allows attackers to manipulate file paths using '..' sequences, potentially enabling them to overwrite system files outside the intended upload directory.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
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
- Low
- Authentication
- X
- User interaction
- None
- Scope
- X
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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 MicroRealEstate installationLocate the MicroRealEstate application directory and identify the installed version by checking version files, headers, or the application itselfAffected if MicroRealEstate is installed and the version falls within any known affected ranges (if available)
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Verify file upload feature is enabledExamine the application configuration files (typically in config/ or settings) for upload-related parameters such as 'enable_upload', 'allow_uploads', or similar flagsAffected if File upload functionality is enabled in the configuration
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Identify configured upload directoryLocate the upload directory path in configuration files - look for parameters like 'upload_path', 'upload_dir', or 'file_storage_path'Affected if The upload directory is set to a system directory or a directory that allows overwriting critical system files
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Inspect upload handling code for path validationReview the file upload handler code (typically in upload.php, uploadhandler, or similar) for presence of path traversal validation - specifically look for checks that sanitize or block '..' sequencesAffected if No input validation exists for '..' sequences or the validation can be bypassed
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Review logs for traversal attemptsSearch application and system logs for patterns containing '..' in file upload requests or any anomalous file paths that indicate exploitation attemptsAffected if Log entries show successful or attempted directory traversal via file uploads
A defender is affected if MicroRealEstate with file upload enabled is installed and lacks proper path validation to block '..' sequences, allowing uploads outside the intended directory.
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 strict path validation to prevent directory traversal sequences and restrict all file uploads to a hardened, non-system directory with proper access controls.
- Consultation3.0 h
- Implementation6.0 h
- Testing3.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2026-57871 — 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-2026-57871 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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