CVE-2021-25921

Improper Neutralization of Input During Web Page Generation

CVSS 3.1 Medium 5.4

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Description

In OpenEMR, versions 2.7.3-rc1 to 6.0.0 are vulnerable to Stored Cross-Site-Scripting (XSS) due to user input not being validated properly in the `Allergies` section. An attacker could lure an admin to enter a malicious payload and by that initiate the exploit.

Key data

CVSS 3.1 Medium 5.4

Score published by CISA-ADP in the CVE record.

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Attack vector: Network
The vulnerable component can be reached over a network, possibly from the Internet.
Attack complexity: Low
No special conditions are needed. The attack can be repeated at will.
Privileges required: Low
A basic user account is needed.
User interaction: Required
A user has to do something first, such as opening a file or following a link.
Scope: Changed
The impact can reach other components beyond the vulnerable one.
Confidentiality impact: Low
Limited effect on the secrecy of data.
Integrity impact: Low
Limited effect on the trustworthiness of data.
Availability impact: None
No effect on availability.

Metric	Value	What it means
Attack vector	Network	The vulnerable component can be reached over a network, possibly from the Internet.
Attack complexity	Low	No special conditions are needed. The attack can be repeated at will.
Privileges required	Low	A basic user account is needed.
User interaction	Required	A user has to do something first, such as opening a file or following a link.
Scope	Changed	The impact can reach other components beyond the vulnerable one.
Confidentiality impact	Low	Limited effect on the secrecy of data.
Integrity impact	Low	Limited effect on the trustworthiness of data.
Availability impact	None	No effect on availability.

CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at first.org/cvss.

EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score: 0.89286 (89.3% probability)
Percentile: 99.8%
Scores of: Nov 10, 2026
Model: v2026.06.15

CISA assessment as of Apr 30, 2025

Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA.

Exploitation: Public proof of concept recorded by CISA
Automatable: no
Technical impact: partial

Weakness (CWE)

CWE catalog version 5.0.

CWE-79Improper Neutralization of Input During Web Page Generation

Affected products

Products listed in the CVE record, as the CNA published them.

openemr
- affected: 2.7.3-rc1, 2.8.0, 2.8.1, 2.8.2, 2.8.3, 2.9.0, 3.0.0, 3.0.1, 3.1.0, 3.2.0, 4.0.0, 4.1.0, 4.1.1, 4.1.2, 4.1.2.3, 4.1.2.6, 4.1.2.7, 4.2.0, 4.2.0.3, 4.2.1, 4.2.2, 5.0.0, 5.0.0.5, 5.0.0.6, 5.0.1, 5.0.1.1,

References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

Timeline

ID reservedJan 22, 2021
Record publishedMar 22, 2021
Record last updatedApr 30, 2025

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About CubePath

CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection.

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Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:53 UTC. Sources and licenses