CVE-2023-49103
HighExploitedPublic exploitThe graphapi app relies on a third-party GetPhpInfo.php library that provides a URL.
Published Nov 27, 2023 · Updated Oct 21, 2025 · Also known as TR-23-0663
Key Facts
Patch immediately- CVE-2023-49103 is a high-severity vulnerability (CVSS 7.5 v3.1) affecting Graph API (Owncloud).
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Nov 26, 2023. Public exploit code is available.
- EPSS estimates a 78% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS (30-day exploit likelihood)
78%
Higher than 99.5% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2023-49103 brief as a PDF
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Description
An issue was discovered in ownCloud owncloud/graphapi 0.2.x before 0.2.1 and 0.3.x before 0.3.1. The graphapi app relies on a third-party GetPhpInfo.php library that provides a URL. When this URL is accessed, it reveals the configuration details of the PHP environment (phpinfo). This information includes all the environment variables of the webserver. In containerized deployments, these environment variables may include sensitive data such as the ownCloud admin password, mail server credentials, and license key. Simply disabling the graphapi app does not eliminate the vulnerability. Additionally, phpinfo exposes various other potentially sensitive configuration details that could be exploited by an attacker to gather information about the system. Therefore, even if ownCloud is not running in a containerized environment, this vulnerability should still be a cause for concern. Note that Docker containers from before February 2023 are not vulnerable to the credential disclosure.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Nov 30, 2023 | Dec 21, 2023 | Not reported |
| Industry KEV feed | Nov 27, 2023 | Dec 21, 2023 | Not reported |
| CIRCL KEV | Nov 26, 2023 | Dec 21, 2023 | Not reported |
| ENISA EUVD | Nov 30, 2023 | n/a | Not reported |
Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Affected Products
2 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Graph APIOwncloud | 0.2.0, 0.3.0 | n/a |
Timeline
Added to CIRCL KEV
Nov 26, 2023
Publicly disclosed
Nov 27, 2023
Added to Industry KEV feed
Nov 27, 2023
Added to CISA KEV
Nov 30, 2023
Added to ENISA EUVD
Nov 30, 2023
Last updated
Oct 21, 2025
Weakness Type
- CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
References
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2023-49103
- advisoryhttps://owncloud.com/security-advisories/disclosure-of-sensitive-credentials-and-configuration-in-containerized-deployments/
- advisoryhttps://owncloud.com/security-advisories/subdomain-validation-bypass/
- advisoryhttps://www.techworm.net/2023/11/critical-vulnerability-owncloud-file-sharing-app.html
- advisoryUSOM advisory
FAQ
Common Questions.
An issue was discovered in ownCloud owncloud/graphapi 0.2.x before 0.2.1 and 0.3.x before 0.3.1.
Affected: Graph API (Owncloud) versions 0.2.0, 0.3.0. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Nov 26, 2023.
Yes. It was added on Nov 30, 2023 with a federal remediation due date of Dec 21, 2023.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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