CVE-2025-6998
High
Description
ReDoS in strip_whitespaces() function in cps/string_helper.py in Calibre Web and Autocaliweb allows unauthenticated remote attackers to cause denial of service via specially crafted username parameter that triggers catastrophic backtracking during login. This issue affects Calibre Web: 0.6.24 (Nicolette); Autocaliweb: from 0.7.0 before 0.7.1.
SeverityHigh
CVSS8.7
Exploit probability—
ProductCalibreweb
PublishedJul 24, 2025
First seenJul 24, 2025
Weakness typeCWE-1333CWE-1333
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| calibrewebPyPI | v ≤ 0.6.24 | — |
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