CVE-2020-27991
CVE-2020-27991 is a medium-severity vulnerability in Nagios Nagios Xi with a CVSS 3.x base score of 5.4. Its EPSS exploit-prediction score of 22% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-79.
Key facts
- Severity: Medium (CVSS 3.x base score 5.4)
- CVSS v2: 3.5
- EPSS exploit prediction: 22% (97th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-79
- Affected product: Nagios Nagios Xi
- Published:
- Last modified:
Description
Nagios XI before 5.7.5 is vulnerable to XSS in Account Information (Email field).
Frequently asked questions
- What is CVE-2020-27991?
- Nagios XI before 5.7.5 is vulnerable to XSS in Account Information (Email field).
- How severe is CVE-2020-27991?
- CVE-2020-27991 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
- Is CVE-2020-27991 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 22% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2020-27991?
- CVE-2020-27991 affects Nagios Nagios Xi. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2020-27991?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2020-27991 published?
- CVE-2020-27991 was published on 2020-11-16 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:nagios:nagios_xi:*:*:*:*:*:*:*:*
More vulnerabilities in Nagios Nagios Xi
- CVE-2024-14003 — Critical (CVSS 9.8): Nagios XI versions prior to 2024R1.2 are vulnerable to remote code execution (RCE) through its NRDP (Nagios Remote…
- CVE-2024-13999 — Critical (CVSS 9.8): Nagios XI versions prior to 2024R1.1.3, under certain circumstances, disclose the server's Active Directory (AD) or…
- CVE-2024-13996 — Critical (CVSS 9.8): Nagios XI versions prior to 2024R1.1.3 did not invalidate all other active sessions for a user when that user's…
- CVE-2024-13994 — Critical (CVSS 9.8): Nagios XI versions prior to 2024R1.1.2 contain a missing authorization control when the 'Allow Insecure Logins'…
- CVE-2012-10063 — Critical (CVSS 9.8): Nagios XI versions prior to 2012R1.3 contain a SQL injection vulnerability in the legacy Core Configuration Manager…
- CVE-2024-33775 — Critical (CVSS 9.8): An issue with the Autodiscover component in Nagios XI 2024R1.01 allows a remote attacker to escalate privileges via a…
All CVEs affecting Nagios Nagios Xi →
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 →