CVE-2026-77923: Dolibarr 21.0.0 before 24.0.0 contains an authorization bypass vulnerability caused by an inverted boolean con

Routine

MEDIUM 4.3UPGRADE

CVE-2026-77923 is a medium-severity flaw (CVSS 4.3) affecting dolibarr erp\/crm. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Dolibarr 21.0.0 before 24.0.0 contains an authorization bypass vulnerability caused by an inverted boolean condition in the private-project membership check within the clonetasks mass action handler in htdocs/core/actions_massactions.inc.php. Authenticated users with project creation permission but without access to a target private project can exploit the flawed !in_array() check to clone tasks into unauthorized private projects.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 70%)
CISA exploited list	No
Weakness	CWE-863
Published	2026-08-24
Last modified	2026-10-12

Publisher (CNA): VulnCheck · Vendor: dolibarr

Last updated 2026-10-12 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-24 20:17 UTCPublished CVE record published
2026-10-12 21:10 UTCUpdated Record last modified

dolibarr dolibarr erp\/crm UPGRADE

Affected: >= 21.0.0 and < 24.0.0

Fixed in: 24.0.0

Safe to downgrade to: a release before 21.0.0

1. Check installed version

apt-cache policy dolibarr-erpcrm || rpm -q dolibarr-erpcrm || dolibarr-erpcrm --version

2. UPGRADE to 24.0.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade dolibarr-erpcrm

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade dolibarr-erpcrm

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 21.0.0 (Debian / Ubuntu)

apt-cache madison dolibarr-erpcrm sudo apt install dolibarr-erpcrm=<VERSION_BEFORE_21.0.0> sudo apt-mark hold dolibarr-erpcrm

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list dolibarr-erpcrm sudo dnf downgrade dolibarr-erpcrm-<VERSION_BEFORE_21.0.0> sudo dnf versionlock add dolibarr-erpcrm

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-2026-77923?

dolibarr erp\/crm: upgrade to 24.0.0. Exact commands for each OS are on this page.

Is CVE-2026-77923 being exploited?

CVE-2026-77923 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-2026-77923 affect?

CVE-2026-77923 affects dolibarr erp\/crm. Severity is medium (CVSS 4.3). Dolibarr 21.0.0 before 24.0.0 contains an authorization bypass vulnerability caused by an inverted boolean condition in the private-project membership check within the clonetasks mass action handler in htdocs/core/actions_massactions.inc.ph

How urgent is CVE-2026-77923?

Priority 22/100. No elevated risk signals yet.

Software pages

PHP vulnerabilities

Related CVEs

CVE-2026-22666 HIGH 7.2 UPGRADE Dolibarr ERP/CRM versions prior to 23.0.2 contain an authenticated remote code execution vulnerability in the
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CVE-2026-81730 HIGH 8.2 UPGRADE Dolibarr 9.0.0 through 23.0.4 saves inbound email attachments under the name supplied in the message's MIME he
CVE-2026-81728 HIGH 8.1 UPGRADE Dolibarr before 24.0.0 contains a SQL injection in its CSV and XLSX import wizard

References

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