CVE-2021-43058
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 · uneditedAn open redirect vulnerability exists in Replicated Classic versions prior to 2.53.1 that could lead to spoofing. To exploit this vulnerability, an attacker could send a link that has a specially crafted URL and convince the user to click the link, redirecting the user to an untrusted site.
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 confidenceAn open redirect vulnerability in Replicated Classic versions prior to 2.53.1 allows attackers to craft malicious URLs on the legitimate domain that redirect users to untrusted external sites. This occurs due to insufficient validation of redirect targets, enabling URL spoofing attacks for phishing.
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< 2.53.1CVSS 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
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/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.
-
Confirm Replicated Classic is installedCheck your system for the Replicated Classic application. Look for Replicated Classic processes running or check installed packages on the host where it was deployed.Affected if Replicated Classic is not present on the system
-
Locate the installed versionUse the package manager or version lookup command for your installation method. Common approaches include checking the Replicated admin console, looking at the installation directory, or running: replicated version or vendor help version if CLI is available.Affected if The version cannot be determined or retrieved
-
Compare against the affected version rangeCompare the discovered version number to the vulnerable range: any version prior to 2.53.1 (for example, 2.53.0, 2.52.x, 2.51.x, etc.)Affected if The installed version is 2.53.0 or lower, or any version number less than 2.53.1
-
Verify the web interface is accessibleCheck if the Replicated Classic admin console or web interface is reachable. Open redirect vulnerabilities require the web component to be accessible and actively handling redirect parameters.Affected if The web interface is exposed and processing user-supplied redirect URLs
Your environment is affected if Replicated Classic is installed with any version prior to 2.53.1 and the web interface is accessible.
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 · scoped2.53.1
Upgrade Replicated Classic to version 2.53.1 or later which contains the fix for this open redirect vulnerability.
Replicated Classic 2.53.1
- Identify the currently installed Replicated Classic version
- Upgrade Replicated Classic to version 2.53.1 or later using the standard upgrade process for your deployment method
- Verify the upgrade was successful and the new version is running
- Test that the application functions normally after the upgrade
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation8.0 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 $6,176.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-43058 — 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-2021-43058 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
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
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.
- 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