How severe is CVE-2021-41843?

CVE-2021-41843 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-41843 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 14% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-41843?

CVE-2021-41843 primarily affects Open-emr Openemr. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-41843?

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

When was CVE-2021-41843 published?

CVE-2021-41843 was published on 2021-12-17 and last updated on 2026-06-17.

CVE-2021-41843

CVE-2021-41843 is a medium-severity vulnerability in Open-emr Openemr with a CVSS 3.x base score of 6.5. Its EPSS exploit-prediction score of 14% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-89.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 6.8
EPSS exploit prediction: 14% (96th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-89
Affected product: Open-emr Openemr
Published: 2021-12-17
Last modified: 2026-06-17

Description

An authenticated SQL injection issue in the calendar search function of OpenEMR 6.0.0 before patch 3 allows an attacker to read data from all tables of the database via the parameter provider_id, as demonstrated by the /interface/main/calendar/index.php?module=PostCalendar&func=search URI.

Frequently asked questions

What is CVE-2021-41843?: An authenticated SQL injection issue in the calendar search function of OpenEMR 6.0.0 before patch 3 allows an attacker to read data from all tables of the database via the parameter provider_id, as demonstrated by the /interface/main/calendar/index.php?module=PostCalendar&func=search URI.
How severe is CVE-2021-41843?: CVE-2021-41843 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-41843 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 14% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-41843?: CVE-2021-41843 primarily affects Open-emr Openemr. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-41843?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-41843 published?: CVE-2021-41843 was published on 2021-12-17 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:open-emr:openemr:6.0.0:-:*:*:*:*:*:*
cpe:2.3:a:open-emr:openemr:6.0.0:patch_1:*:*:*:*:*:*
cpe:2.3:a:open-emr:openemr:6.0.0:patch_2:*:*:*:*:*:*

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