CVE-2024-34891: Insufficiently protected credentials in DAV server settings in 1C-Bitrix Bitrix24 23.300.100 allows remote adm

Routine

MEDIUM 6.8DOWNGRADE

CVE-2024-34891 is a medium-severity flaw (CVSS 6.8) affecting bitrix24. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Insufficiently protected credentials in DAV server settings in 1C-Bitrix Bitrix24 23.300.100 allows remote administrators to read Exchange account passwords via HTTP GET request.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	6.8 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.3% (top 78%)
CISA exploited list	No
Weakness	CWE-312
Published	2024-11-04
Last modified	2026-07-05

Publisher (CNA): MITRE · Vendor: bitrix24

Last updated 2026-07-05 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-11-04 19:15 UTCPublished CVE record published
2026-07-05 01:19 UTCUpdated Record last modified

bitrix24 bitrix24 DOWNGRADE

Affected: 23.300.100

Fixed in: no fixed release known

Safe to downgrade to: a release before 23.300.100

1. Check installed version

apt-cache policy bitrix24 || rpm -q bitrix24 || bitrix24 --version

2. No fixed release: DOWNGRADE to a release before 23.300.100 (Debian / Ubuntu)

apt-cache madison bitrix24 sudo apt install bitrix24=<VERSION_BEFORE_23.300.100> sudo apt-mark hold bitrix24

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

dnf --showduplicates list bitrix24 sudo dnf downgrade bitrix24-<VERSION_BEFORE_23.300.100> sudo dnf versionlock add bitrix24

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-2024-34891?

bitrix24: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-34891 being exploited?

CVE-2024-34891 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-2024-34891 affect?

CVE-2024-34891 affects bitrix24. Severity is medium (CVSS 6.8). Insufficiently protected credentials in DAV server settings in 1C-Bitrix Bitrix24 23.300.100 allows remote administrators to read Exchange account passwords via HTTP GET request.

How urgent is CVE-2024-34891?

Priority 34/100. Public exploit reference

Related CVEs

CVE-2024-34887 MEDIUM 4.9 DOWNGRADE Insufficiently protected credentials in AD/LDAP server settings in 1C-Bitrix Bitrix24 23.300.100 allows remote
CVE-2024-34885 MEDIUM 6.8 DOWNGRADE Insufficiently protected credentials in SMTP server settings in 1C-Bitrix Bitrix24 23.300.100 allows remote ad
CVE-2024-34883 MEDIUM 4.9 DOWNGRADE Insufficiently protected credentials in DAV server settings in 1C-Bitrix Bitrix24 23.300.100 allow remote admi
CVE-2024-34882 MEDIUM 4.9 DOWNGRADE Insufficiently protected credentials in SMTP server settings in 1C-Bitrix Bitrix24 23.300.100 allows remote ad

References

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