copyparty allows Regex Denial of Service (ReDoS) in the upload listing
### Summary The `filter` parameter for the "Recent uploads" page allows arbitrary Regexes. If this feature is enabled (which is the default), an attacker can craft a filter which deadlocks the server. ### PoC `https://127.0.0.1:3923/?ru&filter=(.+)+x` ### Impact The server becomes fully inaccessible for a long time.
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2025-54796US | — | — | ||
Copyparty is a portable file server. Versions prior to 1.18.9, the filter parameter for the "Recent Uploads" page allows arbitrary RegExes. If this feature is enabled (which is the… | ||||
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references
External citations — patches, advisories, analysis.
- https://github.com/9001/copypartyPACKAGE
- https://github.com/9001/copyparty/commit/09910ba80784c3980947d92f45db696398c0fd83WEB
- https://github.com/9001/copyparty/releases/tag/v1.18.9WEB
- https://github.com/9001/copyparty/security/advisories/GHSA-5662-2rj7-f2v6WEB
- https://nvd.nist.gov/vuln/detail/CVE-2025-54796ADVISORY
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