CVE-2025-7404: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability in Ca

Q: How do I fix CVE-2025-7404?

autocaliweb: downgrade or apply the listed mitigation; calibre-web: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2025-7404 being exploited?

CVE-2025-7404 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-7404 affect?

CVE-2025-7404 affects autocaliweb, calibre-web. Severity is critical (CVSS 9.8). Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability in Calibre Web, Autocaliweb allows Blind OS Command Injection.This issue affects Calibre Web: 0.6.24 (Nicolette); Autocaliweb: from 0.7

Q: How urgent is CVE-2025-7404?

Priority 66/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEDOWNGRADEDOWNGRADE

CVE-2025-7404 is a critical-severity flaw (CVSS 9.8) affecting autocaliweb, calibre-web. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability in Calibre Web, Autocaliweb allows Blind OS Command Injection.This issue affects Calibre Web: 0.6.24 (Nicolette); Autocaliweb: from 0.7.0 before 0.7.1.

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.8% (top 14%)
CISA exploited list	No
Weakness	CWE-78
Published	2025-07-24
Last modified	2026-06-17

Publisher (CNA): Fluid Attacks · Vendor: gelbphoenix · janeczku

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-07-24 21:15 UTCPublished CVE record published
2026-06-17 10:04 UTCUpdated Record last modified

gelbphoenix autocaliweb DOWNGRADE

Affected: 0.7.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.7.0

1. Check installed version

apt-cache policy autocaliweb || rpm -q autocaliweb || autocaliweb --version

2. No fixed release: DOWNGRADE to a release before 0.7.0 (Debian / Ubuntu)

apt-cache madison autocaliweb sudo apt install autocaliweb=<VERSION_BEFORE_0.7.0> sudo apt-mark hold autocaliweb

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list autocaliweb sudo dnf downgrade autocaliweb-<VERSION_BEFORE_0.7.0> sudo dnf versionlock add autocaliweb

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

janeczku calibre-web DOWNGRADE

Affected: 0.6.24

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.6.24

1. Check installed version

apt-cache policy calibre-web || rpm -q calibre-web || calibre-web --version

2. No fixed release: DOWNGRADE to a release before 0.6.24 (Debian / Ubuntu)

apt-cache madison calibre-web sudo apt install calibre-web=<VERSION_BEFORE_0.6.24> sudo apt-mark hold calibre-web

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list calibre-web sudo dnf downgrade calibre-web-<VERSION_BEFORE_0.6.24> sudo dnf versionlock add calibre-web

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Python (pip) · calibreweb · NO FIX YET · vulnerable: <= 0.6.24 · source

Fedora 46 · sbcl · FIXED · 2.6.10-1.fc46 · FEDORA-2026-feab1a81c6 · source

sudo dnf upgrade --advisory=FEDORA-2026-feab1a81c6

Fedora ELN · python-archspec · FIXED · 0.2.7-1.eln159 · FEDORA-2026-e2a8272db6 · source

sudo dnf upgrade --advisory=FEDORA-2026-e2a8272db6

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

GitHub PoC: mind2hex/CVE-2025-7404-CalibreWeb-0.6.24-BlindCommandInjection (0 stars)
Write-up: fluidattacks.com/advisories/kino

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-7404?

autocaliweb: downgrade or apply the listed mitigation; calibre-web: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-7404 being exploited?

CVE-2025-7404 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-7404 affect?

CVE-2025-7404 affects autocaliweb, calibre-web. Severity is critical (CVSS 9.8). Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability in Calibre Web, Autocaliweb allows Blind OS Command Injection.This issue affects Calibre Web: 0.6.24 (Nicolette); Autocaliweb: from 0.7

How urgent is CVE-2025-7404?

Priority 66/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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