How severe is CVE-2021-23398?

CVE-2021-23398 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-2021-23398?

CVE-2021-23398 affects the following packages: react-bootstrap-table (npm). Ecosystems affected: npm.

How do I fix CVE-2021-23398?

No patched version of react-bootstrap-table has shipped for CVE-2021-23398 yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.

How do I detect CVE-2021-23398 in my npm dependencies?

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

How do I mitigate CVE-2021-23398 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-2021-23398 actively exploited in the wild?

Yes. There are 3 known exploit references for CVE-2021-23398, including 3 in-the-wild exploitations observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2021-23398?

CVE-2021-23398 has an EPSS (Exploit Prediction Scoring System) score of 1.3%, placing it in the 70th 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-2021-23398?

CVE-2021-23398 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-2021-23398 published, and has it been updated?

CVE-2021-23398 was published on December 10, 2021 and was last updated on November 8, 2023. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

📦

📦 npm

Not in CISA KEV

MEDIUM severity

CVE-2021-23398 — react-bootstrap-table

MEDIUM

CVE-2021-23398 is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in react-bootstrap-table. 3 public exploit references exist, so weaponization risk is real. No vendor fix is recorded yet; mitigation options are listed below.

Cross-site scripting in react-bootstrap-table

Published

Dec 10, 2021

Updated

Nov 8, 2023

Affected

1 pkg

Patched

See advisory

Exploits

3 known

Exploitation data as of Oct 1, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

1.3%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs70th percentile — riskier than 70% of all scored CVEsHighest risk

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

How urgent is this, really

CVE-2021-23398 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,738 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

1 pkg affected

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.

144other npm packages depend on this — each one inherits the vulnerability until it's patched upstream

react-bootstrap-tablenpm

24Kdownloads / week

Description

All versions of package react-bootstrap-table are vulnerable to Cross-site Scripting (XSS) via the dataFormat parameter. The problem is triggered when an invalid React element is returned, leading to dangerouslySetInnerHTML being used, which does not sanitize the output.

Affected Packages

1 total

Ecosystem	Package	Vulnerable range	Fix
📦npm	`react-bootstrap-table`	all versions	No fix

Affected Products

1 product · 1 configurations

Application

react-bootstrap-tablereact-bootstrap-table_project

all

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

All versions of package react-bootstrap-table are vulnerable to Cross-si…

snyk.ioNVDJun 2021

All versions of package react-bootstrap-table are vulnerable to Cross-si…

snyk.ioNVDJun 2021

All versions of package react-bootstrap-table are vulnerable to Cross-si…

github.comNVDJun 2021

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for react-bootstrap-table, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Remediation status
No patched version of react-bootstrap-table has shipped for CVE-2021-23398 yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.
Mitigate without a patch
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-2021-23398 in your dependencies?

Find it across npm, 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 known public exploit tooling found.

OpenSSF Scorecard

Package health score

react-bootstrap-table

2.1/10

Code-Review1/10

Maintained0/10

Branch-Protection0/10

Assessed Sep 28, 2026

Timeline

First exploit

Jun 30, 2021

Disclosed

Dec 10, 2021

Last updated

Nov 8, 2023

Identifiers

CVE-2021-23398

References

Advisorynvd.nist.gov Webgithub.com Webgithub.com Websnyk.io Websnyk.io

Related vulnerabilities

This CVE is medium severity; 8 of 8 other CVEs with CWE-79 are rated as high or higher (top: high).

CVE-2026-91127CVE-2026-77606CVE-2026-84992CVE-2026-77608CVE-2026-77607GHSA-9rcc-pmj8-ffhrCVE-2026-77616CVE-2025-61682Browse all CWE-79

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedNov 8, 2023

CVE-2021-23398 — react-bootstrap-table

EPSS Exploitation Probability

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

Description

Affected Packages

Affected Products

Detection & mitigation playbook

Detect

Remediation status

Mitigate without a patch

Frequently Asked Questions

Is CVE-2021-23398 in your dependencies?