How severe is CVE-2019-20435?

CVE-2019-20435 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2019-20435 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-20435?

CVE-2019-20435 affects Wso2 Api Manager. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-20435?

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

When was CVE-2019-20435 published?

CVE-2019-20435 was published on 2020-01-28 and last updated on 2026-06-17.

CVE-2019-20435

CVE-2019-20435 is a medium-severity vulnerability in Wso2 Api Manager with a CVSS 3.x base score of 4.8. 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 4.8)
CVSS v2: 3.5
EPSS exploit prediction: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Wso2 Api Manager
Published: 2020-01-28
Last modified: 2026-06-17

Description

An issue was discovered in WSO2 API Manager 2.6.0. A reflected XSS attack could be performed in the inline API documentation editor page of the API Publisher by sending an HTTP GET request with a harmful docName request parameter.

Frequently asked questions

What is CVE-2019-20435?: An issue was discovered in WSO2 API Manager 2.6.0. A reflected XSS attack could be performed in the inline API documentation editor page of the API Publisher by sending an HTTP GET request with a harmful docName request parameter.
How severe is CVE-2019-20435?: CVE-2019-20435 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2019-20435 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-20435?: CVE-2019-20435 affects Wso2 Api Manager. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-20435?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-20435 published?: CVE-2019-20435 was published on 2020-01-28 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:wso2:api_manager:2.6.0:*:*:*:*:*:*:*

More vulnerabilities in Wso2 Api Manager

CVE-2026-5430 — Critical (CVSS 10.0): The JWT authentication mechanism accepts tokens signed with algorithms other than those explicitly configured or…
CVE-2026-1728 — Critical (CVSS 9.8): Tokens issued to a low-privileged user are not sufficiently restricted, allowing them to be used to access…
CVE-2025-9312 — Critical (CVSS 9.8): A missing authentication enforcement vulnerability exists in the mutual TLS (mTLS) implementation used by System REST…
CVE-2025-9152 — Critical (CVSS 9.8): An improper privilege management vulnerability exists in WSO2 API Manager due to missing authentication and…
CVE-2025-10611 — Critical (CVSS 9.8): Due to an insufficient access control implementation in multiple WSO2 Products, authentication and authorization checks…
CVE-2024-6914 — Critical (CVSS 9.8): An incorrect authorization vulnerability exists in multiple WSO2 products due to a business logic flaw in the account…

All CVEs affecting Wso2 Api Manager →

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

CVE-2026-106102 — Critical (CVSS 10.0): Quasar Framework is a framework for building high-performance Vue.js user interfaces. Prior to 2.22.0, the SSR-only…
CVE-2026-59167 — Critical (CVSS 10.0): SunEditor is a lightweight and powerful WYSIWYG editor in vanilla JavaScript with no dependencies. Prior to 2.47.11,…
CVE-2026-85061 — Critical (CVSS 10.0): MapLibre GL JS is an interactive vector tile map library for web browsers. Prior to 6.4.1, DOM.sanitize() in…
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…

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