CVE-2021-27990
CVE-2021-27990 is a high-severity vulnerability in Appspace with a CVSS 3.x base score of 7.5. 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-287.
Key facts
- Severity: High (CVSS 3.x base score 7.5)
- CVSS v2: 5.0
- EPSS exploit prediction: 1% (71st percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-287
- Affected product: Appspace
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2021-27990?
- 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.
- How severe is CVE-2021-27990?
- CVE-2021-27990 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
- Is CVE-2021-27990 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-27990?
- CVE-2021-27990 affects Appspace. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-27990?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2021-27990 published?
- CVE-2021-27990 was published on 2021-04-14 and last updated on 2026-07-09.
References
Affected products (1)
- cpe:2.3:a:appspace:appspace:6.2.4:*:*:*:*:*:*:*
More vulnerabilities in Appspace
- CVE-2021-27670 — Critical (CVSS 9.8): Appspace 6.2.4 allows SSRF via the api/v1/core/proxy/jsonprequest url parameter.
- CVE-2021-27704 — Medium (CVSS 6.5): Appspace 6.2.4 is affected by Incorrect Access Control via the Appspace Web Portal password reset page.
- CVE-2021-27989 — Medium (CVSS 5.4): Appspace 6.2.4 is vulnerable to stored cross-site scripting (XSS) in multiple parameters within…
- CVE-2021-27564 — Medium (CVSS 5.4): A stored XSS issue exists in Appspace 6.2.4. After a user is authenticated and enters an XSS payload under the groups…
Other CWE-287 (Improper Authentication) vulnerabilities
- CVE-2026-45480 — Critical (CVSS 10.0): Improper authentication in Azure Active Directory allows an unauthorized attacker to elevate privileges over a network.
- CVE-2026-46389 — Critical (CVSS 10.0): UDS Identity Config builds the Keycloak configuration image (realm, plugins, theme, truststore, JARs) consumed by UDS…
- CVE-2026-10611 — Critical (CVSS 10.0): An authentication bypass vulnerability exists in MISP when LDAP mixed authentication is enabled with OTP enforcement.…
- CVE-2026-47280 — Critical (CVSS 10.0): Improper authentication in Azure Resource Manager (ARM) allows an unauthorized attacker to elevate privileges over a…
- CVE-2026-42822 — Critical (CVSS 10.0): Improper authentication in Azure Local Disconnected Operations allows an unauthorized attacker to elevate privileges…
- CVE-2026-20182 — Critical (CVSS 10.0): May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and…
Browse all CWE-287 (Improper Authentication) vulnerabilities →