CVE-2021-42718: Information Disclosure in API in Replicated Replicated Classic versions prior to 2.53.1 on all platforms allows authenticated users with Admin Console access to

Information Disclosure in API in Replicated Replicated Classic versions prior to 2.53.1 on all platforms allows authenticated users with Admin Console access to

Information Disclosure in API in Replicated Replicated Classic versions prior to 2.53.1 on all platforms allows authenticated users with Admin Console access to retrieve sensitive data, including application secrets, via accessing container definitions with environment variables through the Admin Console API on port 8800. This CVE was originally reserved in 2021 and later publicly disclosed by Replicated on their website on 21 October 2021. However, it mistakenly remained in the Reserved But Public (RBP) status with the CVE Numbering Authority (CNA). Please note that this product reached its end of life on 31 December 2024. Publishing this CVE with the CNA was required to comply with CNA rules, despite the fact that the issue was disclosed and fixed four years ago, and the affected product is no longer supported as of 2024. Summary of VulnerabilityThis advisory discloses a low severity security vulnerability in the versions of Replicated Classic listed above (“Affected Replicated Classic Versions”) DescriptionReplicated Classic versions prior to 2.53.1 have an authenticated API from the Replicated Admin Console that may expose sensitive data including application secrets, depend

Description from the National Vulnerability Database, published by security@replicated.com

What it means for a small business

If your business uses Replicated Classic, install the vendor's update. If you're not sure whether you use it, ask whoever manages your computers.

How likely is an attack? The Exploit Prediction Scoring System, run by FIRST (the global association of security response teams), puts the odds of this one being exploited in the next 30 days at 0.38%, higher than 32% of CVEs. That’s low, but low isn’t zero, and the odds jump the day someone publishes an exploit. Scored October 28, 2026, updated daily.

Check your own setup

Website check: reads what your site runs from the outside (WordPress version, plugins it can see, old server software) and matches it against this database.
Server check: what your web server says about itself, and whether that version has known flaws.

Sources

Part of the Huttenlocher Technologies vulnerability database, refreshed twice a day from CISA and the NVD. The title, category and plain-language guidance are ours; check the linked record before acting on a detail. This is general guidance, not a review of your systems.

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