How severe is CVE-2023-23944?

CVE-2023-23944 has a CVSS 3.x base score of 2.0, rated low severity. It is exploitable over network with high attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2023-23944 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-23944?

CVE-2023-23944 affects Nextcloud Mail. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-23944?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-23944 published?

CVE-2023-23944 was published on 2023-02-06 and last updated on 2026-06-17.

CVE-2023-23944

CVE-2023-23944 is a low-severity vulnerability in Nextcloud Mail with a CVSS 3.x base score of 2.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-312.

Key facts

Severity: Low (CVSS 3.x base score 2.0)
EPSS exploit prediction: 0% (38th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-312
Affected product: Nextcloud Mail
Published: 2023-02-06
Last modified: 2026-06-17

Description

Nextcloud mail is an email app for the nextcloud home server platform. In versions prior to 2.2.2 user's passwords were stored in cleartext in the database during the duration of OAuth2 setup procedure. Any attacker or malicious user with access to the database would have access to these user passwords until the OAuth setup has been completed. It is recommended that the Nextcloud Mail app is upgraded to 2.2.2. There are no known workarounds for this issue.

Frequently asked questions

What is CVE-2023-23944?: Nextcloud mail is an email app for the nextcloud home server platform. In versions prior to 2.2.2 user's passwords were stored in cleartext in the database during the duration of OAuth2 setup procedure. Any attacker or malicious user with access to the database would have access to these user passwords until the OAuth setup has been completed. It is recommended that the Nextcloud Mail app is upgraded to 2.2.2. There are no known workarounds for this issue.
How severe is CVE-2023-23944?: CVE-2023-23944 has a CVSS 3.x base score of 2.0, rated low severity. It is exploitable over network with high attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2023-23944 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-23944?: CVE-2023-23944 affects Nextcloud Mail. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-23944?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-23944 published?: CVE-2023-23944 was published on 2023-02-06 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:nextcloud:mail:*:*:*:*:*:*:*:*

More vulnerabilities in Nextcloud Mail

CVE-2021-32652 — High (CVSS 8.8): Nextcloud Mail is a mail app for the Nextcloud platform. A missing permission check in Nextcloud Mail before 1.4.3 and…
CVE-2022-31132 — High (CVSS 8.3): Nextcloud Mail is an email application for the nextcloud personal cloud product. Affected versions shipped with a CSS…
CVE-2024-52508 — High (CVSS 8.2): Nextcloud Mail is the mail app for Nextcloud, a self-hosted productivity platform. When a user is trying to set up a…
CVE-2020-8156 — High (CVSS 7.0): A missing verification of the TLS host in Nextcloud Mail 1.1.3 allowed a man in the middle attack.
CVE-2023-23943 — Medium (CVSS 5.0): Nextcloud mail is an email app for the nextcloud home server platform. In affected versions the SMTP, IMAP and Sieve…
CVE-2023-45660 — Medium (CVSS 4.3): Nextcloud mail is an email app for the Nextcloud home server platform. In affected versions a missing check of origin,…

All CVEs affecting Nextcloud Mail →

Other CWE-312 (Cleartext Storage of Sensitive Information) vulnerabilities

CVE-2022-43757 — Critical (CVSS 9.9): A Cleartext Storage of Sensitive Information vulnerability in SUSE Rancher allows users on managed clusters to gain…
CVE-2021-36782 — Critical (CVSS 9.9): A Cleartext Storage of Sensitive Information vulnerability in SUSE Rancher allows authenticated Cluster Owners, Cluster…
CVE-2020-9045 — Critical (CVSS 9.9): During installation or upgrade to Software House C•CURE 9000 v2.70 and American Dynamics victor Video Management…
CVE-2026-31848 — Critical (CVSS 9.8): Nexxt Solutions Nebula 300+ firmware through version 12.01.01.37 uses the ecos_pw cookie for authentication, which…
CVE-2025-65826 — Critical (CVSS 9.8): The mobile application was found to contain stored credentials for the network it was developed on. If an attacker…
CVE-2025-34206 — Critical (CVSS 9.8): Vasion Print (formerly PrinterLogic) Virtual Appliance Host and Application (VA and SaaS deployments) mount host…

Browse all CWE-312 (Cleartext Storage of Sensitive Information) vulnerabilities →