CVE-2024-6424: External server-side request vulnerability in MESbook 20221021.03 version, which could allow a remote, unauthe

Q: How urgent is CVE-2024-6424?

Priority 48/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.3REMOTEDOWNGRADE

CVE-2024-6424 is a critical-severity flaw (CVSS 9.3) affecting mesbook. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

External server-side request vulnerability in MESbook 20221021.03 version, which could allow a remote, unauthenticated attacker to exploit the endpoint "/api/Proxy/Post?userName=&password=&uri=<FILE|INTERNAL URL|IP/HOST" or "/api/Proxy/Get?userName=&password=&uri=<ARCHIVO|URL INTERNA|IP/HOST" to read the source code of web files, read internal files or access network resources.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.3 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 58%)
CISA exploited list	No
Weakness	CWE-918
Published	2024-07-01
Last modified	2026-06-17

Publisher (CNA): Spanish National Cybersecurity Institute, S.A. (INCIBE) · Vendor: mesbook

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

Am I affected?

Timeline

2024-07-01 13:15 UTCPublished CVE record published
2026-06-17 08:17 UTCUpdated Record last modified

mesbook mesbook DOWNGRADE

Affected: 20221021.03

Fixed in: no fixed release known

Safe to downgrade to: a release before 20221021.03

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 20221021.03 (Debian / Ubuntu)

apt-cache madison mesbook sudo apt install mesbook=<VERSION_BEFORE_20221021.03> sudo apt-mark hold mesbook

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

dnf --showduplicates list mesbook sudo dnf downgrade mesbook-<VERSION_BEFORE_20221021.03> sudo dnf versionlock add mesbook

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.

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-2024-6424?

mesbook: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-6424 being exploited?

CVE-2024-6424 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-2024-6424 affect?

CVE-2024-6424 affects mesbook. Severity is critical (CVSS 9.3). External server-side request vulnerability in MESbook 20221021.03 version, which could allow a remote, unauthenticated attacker to exploit the endpoint "/api/Proxy/Post?userName=&password=&uri=<FILE|INTERNAL URL|IP/HOST" or "/api/Proxy/Get?

How urgent is CVE-2024-6424?

Priority 48/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2024-6427 HIGH 7.5 DOWNGRADE Uncontrolled Resource Consumption vulnerability in MESbook 20221021.03 version
CVE-2024-6426 HIGH 8.1 DOWNGRADE Information exposure vulnerability in MESbook 20221021.03 version, the exploitation of which could allow a loc
CVE-2024-6425 CRITICAL 9.1 DOWNGRADE Incorrect Provision of Specified Functionality vulnerability in MESbook 20221021.03 version

References

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