EUVD-2026-72874
GHSA-hxfh-ccwg-qrc6
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Superuser must plant the payload (PR:H); it executes in a different superuser's browser context to steal tokens (S:C), yielding confidentiality and integrity/ATO impact with no availability effect.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
4DescriptionCVE.org
Snipe-IT versions before 8.7.0 contain a CSS injection vulnerability in the Custom CSS field due to incomplete sanitization that reverses HTML encoding on greater-than and double-quote characters. Superusers can plant malicious CSS payloads using @import and url() references to exfiltrate CSRF tokens from other superusers via attribute-selector rules, enabling account takeover.
AnalysisAI
Stored CSS injection in Snipe-IT before 8.7.0 lets a superuser plant malicious CSS in the Custom CSS branding setting that executes in every other superuser's browser, exfiltrating their CSRF tokens and enabling account takeover. The flawed sanitizer HTML-encoded input but then selectively reversed the encoding on '>' and '"' while never filtering @import or url(), permitting attribute-selector rules to leak tokens character-by-character. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires superuser privileges to write the Custom CSS branding setting (PR:H) - this is not exploitable by ordinary users or unauthenticated attackers. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine account-takeover chain but gated by a high privilege bar: the CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:H/UI:N, VC:H/VI:H, SC:H/SI:H) confirms the attacker must already hold superuser rights to plant the payload - so the practical threat is a rogue or compromised admin escalating laterally against other superusers, not a remote unauthenticated break-in. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Vendor-released patch: upgrade to Snipe-IT 8.7.0 or later, which rewrites the Custom CSS sanitizer to strip_tags input, remove @import at-rules, and block absolute/protocol-relative/data:/javascript: url() targets (commit d26d716; advisory GHSA-pvcw-mp8q-mj39). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Snipe-IT instances and verify current versions against 8.7.0 to identify vulnerable deployments; immediately restrict superuser account access to minimize exposure during remediation. …
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Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
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