CVE-2023-49706: Defective request context handling in Self Service in LinOTP 3.x before 3.2.5 allows remote unauthenticated at

Routine

MEDIUM 6.8UPGRADEUPGRADE

CVE-2023-49706 is a medium-severity flaw (CVSS 6.8) affecting linotp, virtual appliance. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Defective request context handling in Self Service in LinOTP 3.x before 3.2.5 allows remote unauthenticated attackers to escalate privileges, thereby allowing them to act as and with the permissions of another user. Attackers must generate repeated API requests to trigger a race condition with concurrent user activity in the self-service portal.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.8 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.6% (top 51%)
CISA exploited list	No
Weakness	CWE-362
Published	2023-12-19
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: linotp

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

Am I affected?

Timeline

2023-12-19 19:15 UTCPublished CVE record published
2026-06-17 06:36 UTCUpdated Record last modified

linotp linotp UPGRADE

Affected: >= 3.0.0 and <= 3.2.4

Fixed in: newer than 3.2.4

Safe to downgrade to: a release before 3.0.0

1. Check installed version

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

2. UPGRADE to newer than 3.2.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade linotp

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade linotp

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 3.0.0 (Debian / Ubuntu)

apt-cache madison linotp sudo apt install linotp=<VERSION_BEFORE_3.0.0> sudo apt-mark hold linotp

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

dnf --showduplicates list linotp sudo dnf downgrade linotp-<VERSION_BEFORE_3.0.0> sudo dnf versionlock add linotp

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.

linotp virtual appliance UPGRADE

Affected: >= 3.0.0 and <= 3.2.4

Fixed in: newer than 3.2.4

Safe to downgrade to: a release before 3.0.0

1. Check installed version

apt-cache policy virtual-appliance || rpm -q virtual-appliance || virtual-appliance --version

2. UPGRADE to newer than 3.2.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade virtual-appliance

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade virtual-appliance

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 3.0.0 (Debian / Ubuntu)

apt-cache madison virtual-appliance sudo apt install virtual-appliance=<VERSION_BEFORE_3.0.0> sudo apt-mark hold virtual-appliance

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

dnf --showduplicates list virtual-appliance sudo dnf downgrade virtual-appliance-<VERSION_BEFORE_3.0.0> sudo dnf versionlock add virtual-appliance

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-2023-49706?

linotp: upgrade to newer than 3.2.4; virtual appliance: upgrade to newer than 3.2.4. Exact commands for each OS are on this page.

Is CVE-2023-49706 being exploited?

CVE-2023-49706 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-2023-49706 affect?

CVE-2023-49706 affects linotp, virtual appliance. Severity is medium (CVSS 6.8). Defective request context handling in Self Service in LinOTP 3.x before 3.2.5 allows remote unauthenticated attackers to escalate privileges, thereby allowing them to act as and with the permissions of another user. Attackers must generate

How urgent is CVE-2023-49706?

Priority 36/100. No elevated risk signals yet.

Related CVEs

CVE-2019-12887 HIGH 8.1 UPGRADE KeyIdentity LinOTP before 2.10.5.3 has Incorrect Access Control (issue 1 of 2).

References

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