Exploited CVEs / CVE-2023-49103

CVE-2023-49103

ownCloud graphapi Information Disclosure Vulnerability. Exploitation in the wild is confirmed by CISA, not predicted. Federal agencies were required to remediate by 2023-12-21 (that deadline has passed); treat that date as the outer bound for your own environment. Check the vendor security advisory for the fix.

HighCISA KEV

Actively exploited ownCloud graphapi vulnerability, High severity, CVSS 7.5. Added to the CISA KEV catalog 2023-11-30.

Senserva AI read on CVE-2023-49103CISA required actionOfficial fix for CVE-2023-49103Admin questions

Risk summary

CVSS base
7.5
EPSS exploit probability
78%
Severity
High
Added to KEV
2023-11-30
CISA due date
2023-12-21 (past due)
Patch now
Exploited in the wild: confirmed by the CISA KEV catalog, not predicted.
No vendor fix is mapped yet. This page refreshes daily and will name the patch the day one is published.
Do this now: Federal remediation deadline 2023-12-21; treat it as your outer bound. Patch now and verify deployment on every exposed device.

Updated July 25, 2026. Data refreshed on every build from MSRC, CISA KEV, and FIRST EPSS.

Senserva AI Opinion for CVE-2023-49103

ownCloud's graphapi app exposes phpinfo() output through GetPhpInfo.php, and in containerized deployments that page includes environment variables holding the admin password, mail server credentials, and license keys. Mass exploitation began within days of disclosure, one of the fastest weaponizations of late 2023, reflected in the 78 percent EPSS and November 2023 KEV entry. It is credential disclosure at the cost of a single GET request.

Do this: Patch ownCloud, delete the vulnerable phpinfo endpoint, and rotate every secret that lived in the server's environment: admin, database, mail, and object storage credentials.

AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.

Senserva AI Opinion and rich prompt for CVE-2023-49103

Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.

Full tracking and change history for CVE-2023-49103

Published
2023-11-30
Last revised
2023-11-30
Changes tracked
1

Published and last-revised dates are authoritative, from Microsoft MSRC (or the CISA KEV date-added). Senserva additionally records day-to-day changes from 2026-07-07, refreshed several times a day; the change count reflects that forward-only tracking.

CISA required action

Federal (BOD 22-01) remediation due date: 2023-12-21 (past due).

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Official fix for CVE-2023-49103

Check the vendor's security advisory channel for the patched ownCloud graphapi versions and workarounds.

CISA KEV entry

Common questions about CVE-2023-49103

Is CVE-2023-49103 actively exploited?

Yes. CVE-2023-49103 was added to the CISA Known Exploited Vulnerabilities (KEV) catalog on 2023-11-30, which means exploitation in the wild has been confirmed, not predicted. Its EPSS 30-day exploitation probability is 78%.

What is the CISA deadline and required action for CVE-2023-49103?

CISA set the federal (BOD 22-01) remediation due date at 2023-12-21, which has passed; treat any unremediated system as overdue. The verbatim required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

What fixes CVE-2023-49103?

Check the vendor's security advisory for the patched ownCloud graphapi versions and any workarounds. KEV listing makes this a fix-first item: patch it ahead of higher-CVSS issues nobody is exploiting.

Can I ask my own AI about CVE-2023-49103?

Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2023-49103's key facts: severity, CVSS, EPSS, the KEV date, the CISA due date, and the required action. Copy it into Claude, ChatGPT, or Copilot; the data is refreshed twice a day (5 AM and 3 PM US Central).

Authoritative references

CVE recordNVD detailCISA KEV catalogFIRST.org EPSS

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Lexicon: the terms on this page
CVE
Common Vulnerabilities and Exposures. A unique ID for one publicly known vulnerability, such as CVE-2025-1234.
KB
Microsoft Knowledge Base article. The identifier for a specific Microsoft update.
KEV
CISA Known Exploited Vulnerabilities. CVEs confirmed exploited in the wild. Fix these first.
CVSS
Common Vulnerability Scoring System. A standardized Severity score from 0 to 10.
EPSS
Exploit Prediction Scoring System. The probability a CVE will be exploited in the next 30 days.
MSRC
Microsoft Security Response Center. Microsoft's Patch Tuesday advisories and KB-to-CVE mapping.
NVD
National Vulnerability Database (NIST). Authoritative CVE metadata and CVSS scores.
Ransomware
The vulnerability is linked to known ransomware activity.
Reference: Microsoft CVE and vulnerability management, the full CVE-to-patch lookup ranked by real-world risk, and the Microsoft patching guide, how Intune, Windows Autopatch, Defender, and Azure Update Manager fit together.
Data notice: this page, the feeds, and the API are provided as is, for informational purposes only, without warranty of any kind. Senserva, LLC does not guarantee the accuracy, completeness, or timeliness of third-party data (MSRC, NVD, CISA KEV, EPSS) and accepts no liability for actions taken based on it; verify against the authoritative vendor advisory before acting. Built daily with Senserva Trustworthy AI. All use of this data is subject to the Senserva EULA.