CVE-2024-6427: Uncontrolled Resource Consumption vulnerability in MESbook 20221021.03 version

This month

HIGH 7.5REMOTEDOWNGRADE

CVE-2024-6427 is a high-severity flaw (CVSS 7.5) affecting mesbook. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Uncontrolled Resource Consumption vulnerability in MESbook 20221021.03 version. An unauthenticated remote attacker can use the "message" parameter to inject a payload with dangerous JavaScript code, causing the application to loop requests on itself, which could lead to resource consumption and disable the application.

Why this priority

High severity
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 53%)
CISA exploited list	No
Weakness	CWE-400, CWE-770
Published	2024-07-03
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

2024-07-03 12:15 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-2024-6427?

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

Is CVE-2024-6427 being exploited?

CVE-2024-6427 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-2024-6427 affect?

CVE-2024-6427 affects mesbook. Severity is high (CVSS 7.5). Uncontrolled Resource Consumption vulnerability in MESbook 20221021.03 version. An unauthenticated remote attacker can use the "message" parameter to inject a payload with dangerous JavaScript code, causing the application to loop requests

How urgent is CVE-2024-6427?

Priority 43/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

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
CVE-2024-6424 CRITICAL 9.3 DOWNGRADE External server-side request vulnerability in MESbook 20221021.03 version, which could allow a remote, unauthe

References

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