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Q1What is this vulnerability? (Essence + Consequences)
🚨 **Essence**: Attachment deletion does not validate repository context permissions.
💥 **Impact**: Although a user loses access to a specific repository, they can still send requests via other authorized repositories to …
🔍 **Vulnerability Point**: Backend logic lacks strict validation of the `repository context`.
📉 **CWE Mapping**: Authorization Bypass / Context Confusion.
Q3Who is affected? (Versions/Components)
📦 **Component**: Gitea (A lightweight Git service developed in Go).
⚠️ **Affected Versions**: Pre-patch versions (Upgrade to **v1.25.4** or later).
Q4What can hackers do? (Privileges/Data)
🕵️ **Attacker Capability**: Horizontal privilege escalation.
🗑️ **Operation**: Use access rights of Repository A to delete attachments from Repository B (to which access has been revoked).
📊 **Data**: Loss of attachments…
🚪 **Complexity**: Medium.
🔑 **Preconditions**: Must have valid access to at least one repository.
🔄 **Operation**: Construct cross-repository deletion requests.
Q6Is there a public Exp? (PoC/Wild Exploitation)
📜 **PoC**: Official detailed PoC code has not been publicly released.
🌍 **In the Wild**: No widespread exploitation reports as of 2026-01-22.
Q7How to self-check? (Features/Scanning)
🔎 **Self-Check**: Verify if the Gitea version is less than v1.25.4.
📋 **Logs**: Audit attachment deletion logs for abnormal cross-repository requests.
Q8Is it fixed officially? (Patch/Mitigation)
✅ **Fixed**: Official patch released in **v1.25.4**.
🔗 **Reference**: GitHub Security Advisory GHSA-jr6h-pwwp-c8g6.
Q9What if no patch? (Workaround)
🛡️ **Temporary Mitigation**:
1. Upgrade to v1.25.4 or later.
2. If upgrading is not possible, restrict users' cross-repository operation permissions or enable WAF to block abnormal deletion requests.
Q10Is it urgent? (Priority Suggestion)
🔥 **Priority**: High.
⚡ **Recommendation**: Upgrade immediately! Involves data integrity corruption, and the exploitation logic is simple, making it easy to automate.