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CVE-2024-56509

changedetection.io has Improper Input Validation Leading to LFR/Path Traversal

8.6 HighFix available

changedetection.io is a free open source web page change detection, website watcher, restock monitor and notification service. Improper input validation in the application can allow attackers to perform local file read (LFR) or path traversal attacks. These vulnerabilities occur when user input is used to construct file paths without adequate sanitization or validation. For example, using file:../../../etc/passwd or file: ///etc/passwd can bypass weak validations and allow unauthorized access to sensitive files. Even though this has been addressed in previous patch, it is still insufficient. This vulnerability is fixed in 0.48.05.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
None
Availability
None

Exploit likelihood

0.71%Up 0.7 points since Dec 28, 2024
90%50%10%1%

What each source reports

CVE List Score used 8.6

changedetection.io has Improper Input Validation Leading to LFR/Path Traversal

changedetection.io is a free open source web page change detection, website watcher, restock monitor and notification service. Improper input validation in the application can allow attackers to perform local file read (LFR) or path traversal attacks. These vulnerabilities occur when user input is used to construct file paths without adequate sanitization or validation. For example, using file:../../../etc/passwd or file: ///etc/passwd can bypass weak validations and allow unauthorized access to sensitive files. Even though this has been addressed in previous patch, it is still insufficient. This vulnerability is fixed in 0.48.05.

Record
CVE-2024-56509
CVSS 3.1
8.6 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Weakness
CWE-200, CWE-22
Updated
2026-11-02
EUVDEUVD-2024-3596 8.6

changedetection.io is a free open source web page change detection, website watcher, restock monitor and notification service. Improper input validation in the application can allow attackers to perform local file read (LFR) or path traversal attacks. These vulnerabilities occur when user input is used to construct file paths without adequate sanitization or validation. For example, using file:../../../etc/passwd or file: ///etc/passwd can bypass weak validations and allow unauthorized access to sensitive files. Even though this has been addressed in previous patch, it is still insufficient. This vulnerability is fixed in 0.48.05.

Record
EUVD-2024-3596
CVSS 3.1
8.6 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Updated
2026-11-03
GitHub AdvisoriesGHSA-j5vv-6wjg-cfr8 8.6

changedetection.io Vulnerable to Improper Input Validation Leading to LFR/Path Traversal

Summary

Improper input validation in the application can allow attackers to perform local file read (LFR) or path traversal attacks. These vulnerabilities occur when user input is used to construct file paths without adequate sanitization or validation. For example, using file:../../../etc/passwd or file: ///etc/passwd can bypass weak validations and allow unauthorized access to sensitive files. Even though this has been addressed in previous patch, it is still insufficient.

Details

The check in this line of code is insufficient.

if re.search(r'^file:/', url.strip(), re.IGNORECASE):

The attacker can still bypass this by using: -file:../../../../etc/passwd -file: ///etc/passwd (with space before /)

PoC

  • Open up a changedetection.io instance with a webdriver configured.
  • Create a new watch with file:../../../../etc/passwd.
  • Check the watch preview.
  • The contents of /etc/passwd should pop out.

Screenshots

Record
GHSA-j5vv-6wjg-cfr8
CVSS 3.1
8.6 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Weakness
CWE-22, CWE-200
Updated
2026-11-02
NVD 8.6

changedetection.io is a free open source web page change detection, website watcher, restock monitor and notification service. Improper input validation in the application can allow attackers to perform local file read (LFR) or path traversal attacks. These vulnerabilities occur when user input is used to construct file paths without adequate sanitization or validation. For example, using file:../../../etc/passwd or file: ///etc/passwd can bypass weak validations and allow unauthorized access to sensitive files. Even though this has been addressed in previous patch, it is still insufficient. This vulnerability is fixed in 0.48.05.

Record
CVE-2024-56509
CVSS 3.1
8.6 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Weakness
CWE-22, CWE-200
Updated
2026-11-02
OSV 8.6

changedetection.io has Improper Input Validation Leading to LFR/Path Traversal

changedetection.io is a free open source web page change detection, website watcher, restock monitor and notification service. Improper input validation in the application can allow attackers to perform local file read (LFR) or path traversal attacks. These vulnerabilities occur when user input is used to construct file paths without adequate sanitization or validation. For example, using file:../../../etc/passwd or file: ///etc/passwd can bypass weak validations and allow unauthorized access to sensitive files. Even though this has been addressed in previous patch, it is still insufficient. This vulnerability is fixed in 0.48.05.

Record
CVE-2024-56509
CVSS 3.1
8.6 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Weakness
CWE-200, CWE-22
Updated
2026-11-02
OSVGHSA-j5vv-6wjg-cfr8 8.6

changedetection.io Vulnerable to Improper Input Validation Leading to LFR/Path Traversal

Summary

Improper input validation in the application can allow attackers to perform local file read (LFR) or path traversal attacks. These vulnerabilities occur when user input is used to construct file paths without adequate sanitization or validation. For example, using file:../../../etc/passwd or file: ///etc/passwd can bypass weak validations and allow unauthorized access to sensitive files. Even though this has been addressed in previous patch, it is still insufficient.

Details

The check in this line of code is insufficient.

if re.search(r'^file:/', url.strip(), re.IGNORECASE):

The attacker can still bypass this by using: -file:../../../../etc/passwd -file: ///etc/passwd (with space before /)

PoC

  • Open up a changedetection.io instance with a webdriver configured.
  • Create a new watch with file:../../../../etc/passwd.
  • Check the watch preview.
  • The contents of /etc/passwd should pop out.

Screenshots

Record
GHSA-j5vv-6wjg-cfr8
CVSS 3.1
8.6 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Weakness
CWE-200, CWE-22
Updated
2026-11-02
OSVPYSEC-2026-1242 8.6

changedetection.io Vulnerable to Improper Input Validation Leading to LFR/Path Traversal

Summary

Improper input validation in the application can allow attackers to perform local file read (LFR) or path traversal attacks. These vulnerabilities occur when user input is used to construct file paths without adequate sanitization or validation. For example, using file:../../../etc/passwd or file: ///etc/passwd can bypass weak validations and allow unauthorized access to sensitive files. Even though this has been addressed in previous patch, it is still insufficient.

Details

The check in this line of code is insufficient.

if re.search(r'^file:/', url.strip(), re.IGNORECASE):

The attacker can still bypass this by using: -file:../../../../etc/passwd -file: ///etc/passwd (with space before /)

PoC

  • Open up a changedetection.io instance with a webdriver configured.
  • Create a new watch with file:../../../../etc/passwd.
  • Check the watch preview.
  • The contents of /etc/passwd should pop out.

Screenshots

Record
PYSEC-2026-1242
CVSS 3.1
8.6 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
changedetection-io
PyPI
 before 0.48.05
0.48.05
changedetection-io
PyPI
 before 0.48.05, plus listed versions
0.38.20.390.39.10.39.100.39.10.post1
Show 45 moreShow less
0.39.10.post20.39.110.39.120.39.130.39.13.10.39.140.39.14.10.39.150.39.160.39.170.39.17.10.39.17.20.39.180.39.190.39.19.10.39.20.39.200.39.20.10.39.20.20.39.20.30.39.20.40.39.210.39.21.10.39.220.39.22.10.39.30.39.40.39.50.39.60.39.70.39.80.39.90.40.00.40.0.10.40.0.20.40.0.30.40.0.40.40.1.00.40.1.10.40.20.40.30.410.41.10.420.42.1
0.48.05

History

History
RecordedChangedSources
aliases, publishedEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2024-56509 is a high vulnerability (CVSS 8.6) in Dgtlmoon Changedetection.io, published December 27, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.71%, the 53rd percentile. Fixed in changedetection-io 0.48.05.

References

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