How severe is CVE-2021-25959?

CVE-2021-25959 has a CVSS score of 6.1/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by CVE-2021-25959?

CVE-2021-25959 affects the following packages: org.opencrx:opencrx-core (Maven), org.opencrx:opencrx-core-models (Maven), org.opencrx:opencrx-core-config (Maven), org.opencrx:opencrx-client (Maven), org.opencrx:opencrx-gradle (Maven). Ecosystems affected: Maven.

How do I fix CVE-2021-25959?

Update org.opencrx:opencrx-core to 5.2.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-25959 is resolved across your whole dependency graph.

How do I detect CVE-2021-25959 in my Maven dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.opencrx:opencrx-core, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2021-25959 if there is no patch (or I can't update yet)?

Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Is CVE-2021-25959 actively exploited in the wild?

No public exploit code has been indexed for CVE-2021-25959 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2021-25959?

CVE-2021-25959 has an EPSS (Exploit Prediction Scoring System) score of 0.9%, placing it in the 59th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2021-25959?

CVE-2021-25959 is classified as Cross-site Scripting (XSS) (CWE-79). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was CVE-2021-25959 published, and has it been updated?

CVE-2021-25959 was published on September 29, 2021 and was last updated on October 20, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

☕

☕ Maven

Not in CISA KEV

MEDIUM severity

CVE-2021-25959 — opencrx-core

MEDIUMFix: opencrx/opencrx@14e75f9

CVE-2021-25959 is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in org.opencrx:opencrx-core. A fix is available for org.opencrx:opencrx-core — see the affected versions and patch details below.

Cross-site Scripting in OpenCRX

Also known asGHSA-rwh9-8xx8-4wfm

Published

Sep 29, 2021

Updated

Oct 20, 2026

Affected

5 pkgs

Patched

5 / 5

Exploits

None indexed

Exploitation data as of Nov 3, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

0.9%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs59th percentile — riskier than 59% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

5 pkgs affected

☕org.opencrx:opencrx-core☕org.opencrx:opencrx-core-models☕org.opencrx:opencrx-core-config☕org.opencrx:opencrx-client☕org.opencrx:opencrx-gradle

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

In OpenCRX, versions v4.0.0 through v5.1.0 are vulnerable to reflected Cross-site Scripting (XSS), due to unsanitized parameters in the password reset functionality. This allows execution of external javascript files on any user of the openCRX instance.

Affected Packages

5 total 5 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`org.opencrx:opencrx-core`	≥ 4.0.0&&< 5.2.0	5.2.0`org.opencrx:opencrx-core:5.2.0`
☕Maven	`org.opencrx:opencrx-core-models`	≥ 4.0.0&&< 5.2.0	5.2.0`org.opencrx:opencrx-core-models:5.2.0`
☕Maven	`org.opencrx:opencrx-core-config`	≥ 4.0.0&&< 5.2.0	5.2.0`org.opencrx:opencrx-core-config:5.2.0`
☕Maven	`org.opencrx:opencrx-client`	≥ 4.0.0&&< 5.2.0	5.2.0`org.opencrx:opencrx-client:5.2.0`
☕Maven	`org.opencrx:opencrx-gradle`	≥ 4.0.0&&< 5.2.0	5.2.0`org.opencrx:opencrx-gradle:5.2.0`

Affected Products

1 product · 1 configurations

Application

opencrxopencrx

≥ 4.0.0 && ≤ 5.1.0

range

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.opencrx:opencrx-core, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update org.opencrx:opencrx-core to 5.2.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-25959 is resolved across your whole dependency graph.
Workarounds
Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2021-25959 in your dependencies?

Find it across Maven, including transitive dependencies.

Scan my dependencies How O3 SCA works

CVSS Score

6.1/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Raw vector

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

CWE Classification

CWE-79Cross-site Scripting (XSS)

Weaponization

No Nuclei template, Metasploit module or public proof-of-concept found.

OpenSSF Scorecard

Package health score

opencrx

1.7/10

Code-Review0/10

Maintained3/10

Branch-Protection0/10

Assessed Oct 26, 2026

Timeline

Disclosed

Sep 29, 2021

Last updated

Oct 20, 2026

Identifiers

CVE-2021-25959

GHSA-rwh9-8xx8-4wfm

References

Fixgithub.com · 14e75f95e5f56fbe7ee897bdf5d858788072e818 Webwhitesourcesoftware.com · CVE 2021 25959 Packagegithub.com · opencrx

Related vulnerabilities

Also affects opencrx-core

This CVE is medium severity, in line with the other 1 CVE affecting opencrx-core.

CVE-2023-27150

Also affects opencrx-core-models

This CVE is medium severity, in line with the other 7 CVEs affecting opencrx-core-models.

CVE-2023-40812CVE-2023-40813CVE-2023-40817CVE-2023-40814CVE-2023-40810CVE-2023-40815CVE-2023-40809

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedOct 20, 2026