Raw vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:NCVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.
Summary
CVE-2026-23880 is a high-severity Improper Input Validation (CWE-20) vulnerability. Its CVSS base score is 7.3 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Browser Session Hijacking (T1185); ranked at the 14th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified map to SA-11 (Developer Testing and Evaluation) and SI-10 (Information Input Validation) — see the control section below for these in your framework.
Deeper analysis AI-assisted summary
Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.
CVE-2026-23880 is a stored cross-site scripting (XSS) vulnerability affecting OnboardLite, a membership lifecycle platform developed for student organizations at the University of Central Florida. Versions prior to the commit 1d32081a66f21bcf41df1ecb672490b13f6e429f are vulnerable, specifically in the dashboard functionality for migrating a user's Discord account. The issue stems from improper input validation and output encoding, mapped to CWE-20 (Improper Input Validation), CWE-79 (Improper Neutralization of Input During Web Page Generation), and CWE-116 (Improper Encoding or Escaping of Output). It has a CVSS v3.1 base score of 7.3 (AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N), indicating high confidentiality and integrity impacts.
An authenticated low-privilege user, such as a regular member, can exploit this by injecting a malicious payload into their Discord account details. When an administrator accesses the dashboard to migrate that user's Discord account, the payload renders and executes in the admin's browser context. This allows the attacker to steal the admin's session cookies, perform unauthorized actions on behalf of the admin, or redirect the admin to phishing sites, potentially compromising the entire platform's administrative functions.
The GitHub security advisory (GHSA-93w8-83cg-h89g) and the patching commit (1d32081a66f21bcf41df1ecb672490b13f6e429f) detail the fix, which involves proper sanitization of user-supplied Discord data before rendering in the dashboard. Administrators should update to the commit 1d32081a66f21bcf41df1ecb672490b13f6e429f or later to mitigate the vulnerability, and as an interim measure, avoid migrating untrusted user Discord accounts or implement content security policies to restrict script execution.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-3283
Vulnerability Data
OnboardLite is a comprehensive membership lifecycle platform built for student organizations at the University of Central Florida. Versions of the software prior to commit 1d32081a66f21bcf41df1ecb672490b13f6e429f have a stored cross-site scripting vulnerability that can be rendered to an admin when they…
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attempt to migrate a user's discord account in the dashboard. Commit 1d32081a66f21bcf41df1ecb672490b13f6e429f patches the issue.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Control response
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- 6 hardening rules · 3 OS baselines
V1.1.2V1.2.1V1.2.3V1.3.2
Mitigating Controls (NIST 800-53 r5) AI
Developer testing and evaluation can discover missing input validation through analysis or test cases.
SI-10 directly requires validity checks on information inputs, structurally preventing improper or missing validation.
Output filtering can catch or sanitize unneutralized script content before it is served to users.
Requiring documented development standards and tools can embed input-validation practices into the engineering process.
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
Secure SDLC practices directly require and enforce input validation during development.
Patching and EOL replacement can remediate known XSS instances in libraries or frameworks (partial) but do nothing to enforce input neutralization in application code (none).
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.
Secure coding standards explicitly require correct output encoding and escaping to preserve message structure.
Testing against a defined set of requirements and using code review plus vulnerability scanning forces validation of inputs and handling of unanticipated conditions, reducing the chance that malformed data will be accepted.
Knowledge exchange on emerging attack techniques and patches reduces the likelihood that cross-site scripting flaws remain unaddressed in deployed applications.
Operational indicators of compromise for web-application attacks can be incorporated into WAF or input-filtering rules, lowering the likelihood that unsanitized data reaches the browser.
Secure-coding guidelines and mandatory security testing (including code scans) compel developers to validate and sanitize inputs at design and implementation time, lowering the incidence of malformed or malicious data reaching downstream components.
Mandating input controls that include integrity checks and input validation ensures that untrusted data is examined before use, blocking the root cause of many injection and malformed-data weaknesses.
Hardening callouts derived
Configuration rules from DISA STIG baselines that bear on weaknesses of the type cited by this CVE. Each rule is shown with the relationship its mapping actually records, against the CWE it was authored against. Derived via CVE→CWE over `controls_xwalks` (authoritative rows only; rows rated `none` are excluded).
RHEL 8 (1 rule)
- V-230265 RHEL 8 must prevent the installation of software, patches, service packs, device drivers, or operating system components of local packages without verification they have been digitally signed using a certificate that is issued by a Certificate Authority (CA) that is recognized and approved by the organization. prevents CWE-20