Cross-site request forgery in AB Download Manager enables file writes
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Passive
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Tampering
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-352.
Summary
AB Download Manager before 1.11.2 by amir1376 contains a cross-site request forgery flaw (CWE-352) in its unauthenticated browser-integration API. A remote attacker can lure a user to a malicious web page that writes attacker-chosen files to arbitrary paths. Files placed in startup folders can run code on the next login.
Written with Claude Haiku 5.5 from the sources below · 2026-11-03
Description from the CNA
AB Download Manager before 1.11.2 contains a cross-site request forgery vulnerability in its unauthenticated browser-integration API that allows remote attackers to write attacker-chosen files to arbitrary paths. A malicious web page can send a text/plain request to /start-headless-download with crafted folder and name values, placing payloads in startup folders for code execution on next login.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
Remediation
Upgrade amir1376 AB Download Manager to version 1.11.2, which fixes the flaw.
Written with Claude Haiku 5.5 from the sources below · 2026-11-03
- Fix · CNA ab-download-manager (amir1376) Fixed in 1.11.2
Timeline
- 2026-11-03 Threatist record created from CVE-2026-121451
- 2026-11-03 Alias added: GHSA-v768-hp7c-4rf7
- 2026-11-05 Priority changed: MEDIUM → LOW
References
Patch 1
Other 4
- GitHub Issue #1489
- https://github.com/amir1376/ab-download-manager
- https://github.com/amir1376/ab-download-manager/blob/v1.11.1/integration/server/src/main/kotlin/com/abdownloadmanager/integration/Endpoints.kt#L27-L75
- https://github.com/amir1376/ab-download-manager/blob/v1.11.1/desktop/app/src/main/kotlin/com/abdownloadmanager/desktop/integration/IntegrationHandlerImp.kt#L55-L88
Sources
- CVE-2026-121451 · CVE Program
- CVE-2026-121451 · NVD
- FIRST EPSS
- GHSA-v768-hp7c-4rf7 · GitHub Advisory Database · CC BY 4.0
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