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Q1What is this vulnerability? (Essence + Consequences)
🚨 **Nature**: A flaw exists in Gitea's repository access permission verification logic.
💥 **Impact**: Users whose permissions have been revoked can still receive notification emails for private repository releases, leadi…
🔍 **CWE**: Improper Access Control.
📍 **Vulnerability Point**: The recipient's current repository access rights are **not correctly re-verified** before sending notification emails.
Q3Who is affected? (Versions/Components)
📦 **Component**: Gitea (a lightweight Git service based on Go).
📅 **Affected Versions**: All versions prior to v1.25.4.
Q4What can hackers do? (Privileges/Data)
🕵️ **Attacker/Perpetrator**: Leverage revoked identities to indirectly obtain release dynamics and metadata of private repositories via **email notifications**.
📊 **Data**: Leaks sensitive information such as release con…
🚪 **Barrier**: Medium.
✅ **Conditions**: The attacker must have once been a repository member (possessing permissions) but was later removed. No additional authentication is required; it exploits a system logic flaw.
Q6Is there a public Exp? (PoC/Wild Exploitation)
🧪 **Exp/PoC**: No public PoC is provided by the vendor.
🌍 **In-the-Wild Exploitation**: No reports yet. However, logic flaws are extremely easy to construct exploitation scenarios for.
Q7How to self-check? (Features/Scanning)
🔎 **Self-Inspection**: Check if the Gitea version is < v1.25.4.
📧 **Monitoring**: Monitor whether users whose permissions were removed continue to receive email notifications for private repositories.
Q8Is it fixed officially? (Patch/Mitigation)
🛡️ **Vendor Fix**: Fixed!
📥 **Patch**: Upgrade to **Gitea v1.25.4** or later.
🔗 **Reference**: GitHub Security Advisory GHSA-f4wq-6ww5-m56p.
Q9What if no patch? (Workaround)
⚠️ **Temporary Workaround**: If upgrading is not possible, it is recommended to temporarily disable the **private repository email notification feature**, or strictly review the notification queue after permission remova…
🔥 **Priority**: High.
💡 **Recommendation**: Involves private data leakage. Although not direct code execution, the compliance risk is significant. It is recommended to **upgrade immediately** to v1.25.4 or later.