CVE-2025-67809
📋 TL;DR
Zimbra Collaboration 10.0 and 10.1 contain hardcoded Flickr API credentials in the publicly accessible Flickr Zimlet. Attackers can retrieve these credentials and impersonate the legitimate application to trick users into granting access to their Flickr data. Only Zimbra installations with the Flickr Zimlet enabled are affected.
💻 Affected Systems
- Zimbra Collaboration Suite
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain unauthorized access to users' Flickr accounts, potentially exposing private photos, metadata, and account information.
Likely Case
Attackers use stolen credentials for limited Flickr API abuse or reconnaissance, with actual user compromise requiring social engineering.
If Mitigated
No impact if credentials are revoked and Zimlet is updated or disabled.
🎯 Exploit Status
Exploitation requires extracting hardcoded credentials from Zimlet files and social engineering users to approve OAuth requests.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions with credentials removed (check Zimbra security advisories)
Vendor Advisory: https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories
Restart Required: No
Instructions:
1. Update to a patched Zimbra version. 2. Remove or disable the Flickr Zimlet if not needed. 3. Verify credentials are no longer present in Zimlet files.
🔧 Temporary Workarounds
Disable Flickr Zimlet
linuxRemove or disable the Flickr Zimlet to eliminate the exposure.
zimbra@mail:~$ zmzimletctl disable com_zimbra_flickr
zimbra@mail:~$ zmzimletctl delete com_zimbra_flickr
🧯 If You Can't Patch
- Disable the Flickr Zimlet immediately.
- Block outbound connections to Flickr APIs at network perimeter.
🔍 How to Verify
Check if Vulnerable:
Check if Flickr Zimlet is enabled: zmzimletctl list | grep flickr. Examine Zimlet files for hardcoded API keys.Check Version:
zimbra@mail:~$ zmcontrol -vVerify Fix Applied:
Confirm Flickr Zimlet is disabled or removed. Verify no API keys in /opt/zimbra/zimlets-deployed/com_zimbra_flickr.📡 Detection & Monitoring
Log Indicators:
- Unusual Flickr API authentication attempts
- Multiple failed OAuth requests from unexpected sources
Network Indicators:
- Suspicious outbound connections to Flickr APIs
- Unexpected OAuth callback traffic
SIEM Query:
source="zimbra.log" AND "flickr" AND ("oauth" OR "api_key")