EUVD-2026-71945
GHSA-4p9p-pq58-9cvp
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/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
Network-accessible IDOR requiring a valid account (PR:L); only integrity of other users' reading records is affected, with no confidentiality or availability impact.
Primary rating from Vendor (vulncheck).
CVSS VectorVendor: vulncheck
Lifecycle Timeline
3DescriptionCVE.org
BookWyrm through 0.9.1 contains an authorization bypass vulnerability in the edit_readthrough function that allows authenticated users to modify other users' reading records. Attackers can exploit sequential ReadThrough IDs to overwrite arbitrary users' start dates, finish dates, progress, and progress mode, affecting reading statistics and exported data.
AnalysisAI
Authenticated IDOR in BookWyrm through 0.9.1 lets any registered user overwrite other users' reading records via the edit_readthrough function, which accepts a sequential ReadThrough ID without verifying record ownership. An attacker with a valid account can enumerate integer IDs and tamper with arbitrary users' start dates, finish dates, reading progress, and progress mode, corrupting reading statistics and exported data. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid BookWyrm account with at least standard user privileges (PR:L) - unauthenticated access is insufficient. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 7.1 is grounded in AV:N/AC:L/PR:L/UI:N with VI:H - low-complexity exploitation by any network-reachable authenticated user with high integrity impact and no confidentiality or availability component. … 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 | No vendor-released patch has been identified at time of analysis - the advisory names 0.9.1 as the latest confirmed-affected version without referencing a fixed release. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all systems running BookWyrm and confirm those on version 0.9.1 or earlier; notify users that reading records may have been subject to unauthorized access and advise verification for tampering. …
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External POC / Exploit Code
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