Security Resilience

CVE-2023-24489

Citrix Sharefile Storage Zones Controller ≤ 5.11.24

CISA KEVActive ExploitationEUVD Exploited
Published
10 July 2023
Modified
26 February 2026
KEV Added
16 August 2023
Patch / advisory
CVSS Score v3.1 9.8
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.97 99.9th percentile
Risk Priority 97 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2023-24489 is a critical-severity Improper Access Control (CWE-284) vulnerability in Citrix Sharefile Storage Zones Controller. Its CVSS base score is 9.8 (Critical).

Operationally, ranked in the top 0.1% of CVEs by exploit likelihood; CISA has added it to the Known Exploited Vulnerabilities catalog.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

A vulnerability tracked as CVE-2023-24489 affects the customer-managed ShareFile storage zones controller. The flaw, assigned a CVSS score of 9.8, stems from improper access control (CWE-284) and permits remote compromise without authentication.

An unauthenticated attacker can exploit the issue over the network to achieve full control of the affected controller, resulting in complete loss of confidentiality, integrity, and availability of the system and any data it manages.

Citrix has published a security update addressing the vulnerability in the ShareFile storage zones controller, and the flaw appears in CISA's catalog of known exploited vulnerabilities, confirming active exploitation in the wild. The associated EPSS score remains elevated, with a current value of 0.9439 and a recorded peak of 0.9745.

OWASP Top 10 for Web (2025)

EU & UK References

Vulnerability Data

A vulnerability has been discovered in the customer-managed ShareFile storage zones controller which, if exploited, could allow an unauthenticated attacker to remotely compromise the customer-managed ShareFile storage zones controller.

CWE(s)
KEV Date Added
16 August 2023

Related Threats

Threat-Actor AttributionAI

Cl0paka Clop
Widely reported as exploited by Cl0p ransomware group in 2023 mass campaign against ShareFile (Mandiant, Microsoft, BleepingComputer).

CVEs Like This One

CVE-2021-22941Same vendor: Citrixboth on KEV
CVE-2019-11634Same vendor: Citrixboth on KEV
CVE-2020-8196Same vendor: Citrixboth on KEV
CVE-2020-8193Same vendor: Citrixboth on KEV
CVE-2023-24486Same vendor: Citrix
CVE-2023-24490Same vendor: Citrix
CVE-2023-24484Same vendor: Citrix
CVE-2025-24989Shared CWE-284both on KEV
CVE-2012-4681Shared CWE-284both on KEV
CVE-2013-0422Shared CWE-284both on KEV

Affected Assets

citrix
sharefile storage zones controller
≤ 5.11.24

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

addresses: CWE-284

The access control policy and procedures directly mandate and enforce proper access control mechanisms across the organization.

addresses: CWE-284

Device lock enforces restricted access until re-authentication, directly reducing unauthorized use of active sessions.

addresses: CWE-284

Supervision and review of access control activities directly detects and remediates improper access configurations or usages.

addresses: CWE-284

Explicitly identifying and documenting actions permitted without identification or authentication enforces proper access control boundaries by defining justified exceptions.

addresses: CWE-284

By automatically labeling outputs with security attributes, the control supports attribute-based enforcement and reduces exploitability of improper access control weaknesses.

addresses: CWE-284

Associating and retaining security attributes with data directly supports enforcement of access control decisions across storage, processing, and transmission.

addresses: CWE-284

Requiring prior authorization for each remote access type prevents improper access control over remote connections.

addresses: CWE-284

Requiring authorization of wireless access before allowing connections enforces proper access control for this access method.

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.

blocks

A.5.1 only requires that an information security policy and topic-specific policies (including on access control) exist and are reviewed; it does not itself enforce, implement or act on any access restriction, so the weakness can still be exploited (per the owner's explicit rule that governance/dependency clauses score none on effect verbs).

blocks

A.5.15 directly mandates determining requirements, defining/implementing topic-specific access control policy+rules (with explicit references to 8.3, 5.16, 5.18), and enforcing authorized access while preventing unauthorized access, which squarely stops exploitation of most CWE-284 instances; the bounded remainder is the physical slice (explicitly delegated to 7.2-7.4) plus any second-order defects like path traversal that are not authorization decisions.

blocks

A.5.16's identity lifecycle (unique binding, timely disable/remove, no duplicates, oversight of shared/non-human) directly stops most improper access by ensuring the actor in an access decision is correctly identified and authorized; the bounded remainder is non-identity mechanisms in CWE-284 such as path traversal or CSRF that do not turn on actor identity at all.

blocks

A.5.18 directly governs the provisioning, review, adjustment and timely revocation of both physical and logical access rights per business rules, segregation of duties and risk-evaluated changes/terminations; this stops most unauthorized-actor exploitation paths named by CWE-284, with a bounded remainder (e.g. path-traversal or CSRF cases that are not authorization decisions at all)

blocks

A.5.2 defines and assigns roles/responsibilities for protection of information and risk acceptance; it does not itself enforce any access decision and cannot stop exploitation of improper access control (per the owner's labeling rule: governance/dependency clauses do not score on prevent/mitigate verbs)

finds

Ongoing audits and performance reviews of suppliers detect and correct situations where access controls or privilege assignments are weaker than contractually required, limiting an attacker's ability to exploit improper access control in the supplier's environment.

Hardening callouts derived

DISA STIG baselines are authored against specific weaknesses. Where this CVE cites a broad weakness class, the mapping is not asserted at that abstraction (owner ruling, 2026-09-25: grade only at Base and below), so no rule is shown here rather than a rule shown against the wrong grain.

  • No fine-grained STIG row for CWE-284, a pillar-level weakness. Rules are authored against its narrower children: CWE-749, CWE-1220.

References