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CVE-2025-65858 is a stored cross-site scripting vulnerability in Calibre-Web 0.6.25. A user able to create accounts can supply JavaScript in the username field. The application stores this value without adequate sanitization, and the payload is rendered and executed when the user-listing functionality is accessed.
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No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A stored cross-site scripting vulnerability in Calibre-Web v0.6.25. An attacker with the required privileges to create a user can store malicious JavaScript in the username field, which executes when a user accesses the /ajax/listusers endpoint.
A specific vulnerability referenced in a Fedora security advisory affecting the calibre package; no further technical details are provided in the content.
A specific vulnerability referenced in a Fedora security update affecting calibre, but the content does not describe the flaw type or impact.
A stored XSS vulnerability in the username field of Calibre-Web.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.