OpenEMR before 8.4.0 Missing Authorization in Portal Onsite-Document APIs
Affects OpenEMR before 8.4.0 when requests run in core mode instead of patient-portal mode, where an authenticated core user can reach cross-patient portal documents. Fixed in 8.4.0.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
- Exploited
- No known exploitation
- Fix
- Fixed in 8.4.0
- Who is exposed
- Specific setups only
Do first: Check whether your setup matches what the bug needs. Request runs in core mode instead of patient-portal mode Attacker is an authenticated core OpenEMR user
- Last modified
- A 0-100 score for how much a CVE matters across the industry: exploitation, exposure, how widely the software is used, severity and whether a fix exists.What do these mean? →
- 17/100 · provisional
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Specific setups only
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
OpenEMR before 8.4.0 contains a missing authorization vulnerability in portal onsite-document APIs that allows any authenticated core user to access cross-patient documents. Attackers can omit the patientId parameter and supply arbitrary record IDs to list, read, and overwrite other patients' portal documents, signatures, and template data.
cve.now Index
- Exploitation?/40Unknown. No CISA SSVC exploitation rating yet
- Exposure8/25Specific setups only, reachable over the network
- Reach?/20Unknown. No tracked technology or package matched
- Severity8.7/10CVSS 8.7
- No patch0/5No signal
What would change the score
- Would score about 67 if added to CISA KEV
- Would score about 62 if CISA's SSVC rates exploitation active
- Would score about 24 if CISA's SSVC rates it automatable
What to do
Check whether your setup matches what the bug needs.
Request runs in core mode instead of patient-portal mode Attacker is an authenticated core OpenEMR userUpgrade to a fixed version: 8.4.0.
Timeline
- CVE published
- First seen by cve.now
Affected versions
- openemr openemr
fixed in 8.4.0
Evidence 2
- Advisory
- Link
Corrections
None so far.
Something wrong on this page? Report an error. Every fix is listed here.
Questions about CVE-2026-124484
Is CVE-2026-124484 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data
What does this mean?
The portal document APIs do not check authorization properly. An authenticated core OpenEMR user can list, read, and overwrite other patients' portal documents, signatures, and template data.Source: github.com, vulncheck.com
Which versions are affected by CVE-2026-124484?
openemr: before 8.4.0.Source: cve.now feed data
Am I affected, and how do I check?
OpenEMR versions from 0 up to but not including 8.4.0 are in the affected range, when requests execute in core mode instead of patient-portal mode. A reader can check the installed version number and whether the installation handles requests in core mode or patient-portal mode.Source: github.com, vulncheck.com
How do I fix CVE-2026-124484?
Upgrade to OpenEMR 8.4.0 or later, which contains the fix. The advisory lists 8.4.0 as the only fixed version.Source: github.com, vulncheck.com