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Mahara CVE-2026-42164

| EUVDEUVD-2026-60548 CRITICAL
Information Exposure (CWE-200)
2026-08-17 mitre GHSA-x7jm-3mhf-jwch
9.8
CVSS 3.1 · Vendor: mitre
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Severity by source

Vendor (mitre) PRIMARY
9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
vuln.today AI
6.5 MEDIUM

Network-reachable, low-complexity disclosure; Text authoring is normally authenticated so PR:L; pure information disclosure means C:H with I:N/A:N, not the NVD I:H/A:H.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (mitre).

CVSS VectorVendor: mitre

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

4
Analysis Generated
Aug 18, 2026 - 13:26 vuln.today
CVSS changed
Aug 18, 2026 - 13:22 NVD
9.8 (CRITICAL)
CVE Published
Aug 17, 2026 - 00:00 cve.org
CRITICAL 9.8
CVE Published
Aug 17, 2026 - 00:00 cve.org
UNKNOWN (no severity yet)

DescriptionCVE.org

Mahara before 25.04.5 and 26.04.0 is vulnerable in the Text block/section functionality when a call is crafted in a certain way that allows it to recall the backed-up content from another Text section.

AnalysisAI

Information disclosure in the Mahara ePortfolio platform before 25.04.5 and 26.04.0 allows remote attackers to retrieve backed-up content belonging to a different Text block/section by crafting a request in a specific way. The flaw (CWE-200) exposes stored draft or historical text that should be isolated per section, potentially leaking other users' or other pages' content. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
technique details hidden
Delivery
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Exploit
technique details hidden
Execution
technique details hidden
Impact
technique details hidden

Vulnerability AssessmentAI

Exploitation Exploitation requires reaching the Mahara Text block/section functionality and issuing a call crafted in a specific way so that it resolves to another Text section's backed-up content; the target content must exist as a stored backup/draft of a Text section. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The signals conflict and should be reconciled before treating the headline number at face value. … 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 Upgrade to a fixed release: Vendor-released patch: 25.04.5 (for the 25.04 branch) or 26.04.0 (for the 26.04 branch), per the Mahara advisory at https://mahara.org/interaction/forum/topic.php?id=10057. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours, audit all Mahara instances in production for their current version and immediately restrict public access; remove external-facing deployments from production pending remediation. …

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Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-42164 vulnerability details – vuln.today

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