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Vulnerability record · CVE-2021-27990 · published 14 April 2021

CVE-2021-27990: Appspace improper authentication vulnerability

Appspace · Appspace

Appspace 6.2.4 is vulnerable to a broken authentication mechanism where pages such as /medianet/mail.aspx can be called directly and the framework is exposed with layouts, menus and functionalities.

7.5 CVSS 3.1 High EPSS 1.4% · top 27.9% CWE-287 · Improper authentication
7.5CVSS 3.1 base score, v2 5.0
1.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
9 Jul 2026Last modified by NVD

Description

Appspace 6.2.4 is vulnerable to a broken authentication mechanism where pages such as /medianet/mail.aspx can be called directly and the framework is exposed with layouts, menus and functionalities.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/syedsohaibkarim/PoC-BrokenAuth-AppSpace6.2.4 Third Party Advisory
https://github.com/syedsohaibkarim/PoC-BrokenAuth-AppSpace6.2.4 Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2021-27670Appspace SSRF via proxy jsonprequest URL parameterAppspace 6.2.4 exposes an api/v1/core/proxy/jsonprequest endpoint whose url parameter can be pointed at arbitrary destinations, producing a server-si…EPSS 61%analysed6.5CVE-2021-27704Appspace cross-site request forgery vulnerabilityAppspace 6.2.4 is affected by Incorrect Access Control via the Appspace Web Portal password reset page.EPSS 0.40%5.4CVE-2021-27989Appspace cross-site scripting vulnerabilityAppspace 6.2.4 is vulnerable to stored cross-site scripting (XSS) in multiple parameters within /medianet/sgcontentset.aspx.EPSS 0.50%5.4CVE-2021-27564Appspace cross-site scripting vulnerabilityA stored XSS issue exists in Appspace 6.2.4. After a user is authenticated and enters an XSS payload under the groups section of the network tab, it …EPSS 0.54%7.5CVE-2026-42018JFrog Artifactory improper authentication leaks anonymous tokenJFrog Artifactory can return an internal anonymous-user token to an unauthenticated caller even when anonymous access is disabled. Because the token …KEVEPSS 9.8%analysed9.8CVE-2026-82329JFrog Artifactory improper authentication allows admin takeoverJFrog Artifactory contains an improper authentication weakness (CWE-287) that, under default configuration, may let an unauthenticated attacker with …KEVEPSS 14%analysed8.8CVE-2026-59822LiteLLM MCP endpoint auth bypass via OAuth2 passthrough fallbackLiteLLM's MCP Streamable HTTP endpoint, prior to 1.84.0, let an unauthenticated attacker send a fabricated Authorization header that triggered an OAu…KEVEPSS 0.84%analysed10.0CVE-2026-49869Kestra OSS auth bypass via path suffix match enables RCEKestra OSS AuthenticationFilter whitelists the public config endpoint using request.getPath().endsWith("/configs"), a suffix match instead of an exac…KEVEPSS 2.1%analysed

Source: NIST National Vulnerability Database (record CVE-2021-27990), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.