How severe is CVE-2021-40369?

CVE-2021-40369 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-40369 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-40369?

CVE-2021-40369 affects Apache Jspwiki. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-40369?

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

When was CVE-2021-40369 published?

CVE-2021-40369 was published on 2021-11-24 and last updated on 2026-06-17.

CVE-2021-40369

CVE-2021-40369 is a medium-severity vulnerability in Apache Jspwiki with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Apache Jspwiki
Published: 2021-11-24
Last modified: 2026-06-17

Description

A carefully crafted plugin link invocation could trigger an XSS vulnerability on Apache JSPWiki, related to the Denounce plugin, which could allow the attacker to execute javascript in the victim's browser and get some sensitive information about the victim. Apache JSPWiki users should upgrade to 2.11.0 or later.

Frequently asked questions

What is CVE-2021-40369?: A carefully crafted plugin link invocation could trigger an XSS vulnerability on Apache JSPWiki, related to the Denounce plugin, which could allow the attacker to execute javascript in the victim's browser and get some sensitive information about the victim. Apache JSPWiki users should upgrade to 2.11.0 or later.
How severe is CVE-2021-40369?: CVE-2021-40369 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-40369 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-40369?: CVE-2021-40369 affects Apache Jspwiki. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-40369?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-40369 published?: CVE-2021-40369 was published on 2021-11-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:apache:jspwiki:*:*:*:*:*:*:*:*

More vulnerabilities in Apache Jspwiki

CVE-2021-44140 — Critical (CVSS 9.1): Remote attackers may delete arbitrary files in a system hosting a JSPWiki instance, versions up to 2.11.0.M8, by using…
CVE-2022-34158 — High (CVSS 8.8): A carefully crafted invocation on the Image plugin could trigger an CSRF vulnerability on Apache JSPWiki before 2.11.3,…
CVE-2022-24947 — High (CVSS 8.8): Apache JSPWiki user preferences form is vulnerable to CSRF attacks, which can lead to account takeover. Apache JSPWiki…
CVE-2025-24853 — High (CVSS 7.5): A carefully crafted request when creating a header link using the wiki markup syntax, which could allow the attacker…
CVE-2019-0225 — High (CVSS 7.5): A specially crafted url could be used to access files under the ROOT directory of the application on Apache JSPWiki…
CVE-2022-28731 — Medium (CVSS 6.5): A carefully crafted request on UserPreferences.jsp could trigger an CSRF vulnerability on Apache JSPWiki before 2.11.3,…

All CVEs affecting Apache Jspwiki →

Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →