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Vulnerability IntelligenceCVE-2025-6998

CVE-2025-6998

HIGH8.7

Calibre Web 0.6.24 & Autocaliweb 0.7.0 - ReDoS

Published Jul 24, 2025

Modified 1 years ago

Details

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.

References

https://fluidattacks.com/advisories/megadeth

https://github.com/gelbphoenix/autocaliweb

https://github.com/janeczku/calibre-web

https://www.cve.org/CVERecord?id=CVE-2025-6998

CVSS Analysis

CVSS v4.0

8.7

Exploitability

Attack Vector

NetworkAV:N

Attack Complexity

LowAC:L

Attack Requirements

NoneAT:N

Privileges Required

NonePR:N

User Interaction

NoneUI:N

Vulnerable System

Vuln. Confidentiality

NoneVC:N

Vuln. Integrity

NoneVI:N

Vuln. Availability

HighVA:H

Subsequent System

Subseq. Confidentiality

NoneSC:N

Subseq. Integrity

NoneSI:N

Subseq. Availability

NoneSA:N

8.7/CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Weakness Type (CWE)

Resource Management

ReDoS (Regex DoS)

Ecosystems

Timeline

PublishedJul 24, 2025

ModifiedJul 25, 2025

CVE-2025-6998 | Mondoo Vulnerability Intelligence