changedetection.io is a free open source web page change detection tool. Prior to 0.55.1, the vulnerability is caused by trusting attacker-controlled snapshot paths restored from backup files. The vulnerable flow starts in the backup restore logic. When a backup ZIP is restored, the application extracts the archive and copies each restored watch UUID directory directly into the live datastore using shutil.copytree(entry.path, dst_dir). This preserves attacker-controlled files inside the restored watch directory, including history.txt. After restore, the application parses history.txt in the watch history property and returns the contents of the targeted local file. This vulnerability is fixed in 0.55.1.
Fix
Patch, vendor advisory and mitigation references on NVD 2
- https://github.com/dgtlmoon/changedetection.io/security/advisories/GHSA-8757-69j2-hx56 Exploit, Mitigation, Vendor Advisory
- https://github.com/pocket-id/pocket-id/security/advisories/GHSA-w6p7-2fxx-4f44 Exploit, Mitigation, Not Applicable, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 7.5 · webtechnologiesNVD modified 2026-10-26 18:10
Affected (CPE criteria) 1
cpe:2.3:a:webtechnologies:changedetection:*:*:*:*:*:*:*:*
References 2
- https://github.com/dgtlmoon/changedetection.io/security/advisories/GHSA-8757-69j2-hx56 Exploit, Mitigation, Vendor Advisory
- https://github.com/pocket-id/pocket-id/security/advisories/GHSA-w6p7-2fxx-4f44 Exploit, Mitigation, Not Applicable, Vendor Advisory