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CVE-2024-32651

Server Side Template Injection in Jinja2 allows Remote Command Execution

10.0 CriticalPublic exploitFix available

changedetection.io is an open source web page change detection, website watcher, restock monitor and notification service. There is a Server Side Template Injection (SSTI) in Jinja2 that allows Remote Command Execution on the server host. Attackers can run any system command without any restriction and they could use a reverse shell. The impact is critical as the attacker can completely takeover the server machine. This can be reduced if changedetection is behind a login page, but this isn't required by the application (not by default and not enforced).

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
High
Availability
High

Exploit likelihood

85.3%Up 85.2 points since Apr 26, 2024
90%50%10%1%

What each source reports

CVE List Score used 10.0

Server Side Template Injection in Jinja2 allows Remote Command Execution

changedetection.io is an open source web page change detection, website watcher, restock monitor and notification service. There is a Server Side Template Injection (SSTI) in Jinja2 that allows Remote Command Execution on the server host. Attackers can run any system command without any restriction and they could use a reverse shell. The impact is critical as the attacker can completely takeover the server machine. This can be reduced if changedetection is behind a login page, but this isn't required by the application (not by default and not enforced).

Record
CVE-2024-32651
CVSS 3.1
10.0 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Weakness
CWE-1336
Updated
2026-11-02
EUVDEUVD-2024-2939 10.0

changedetection.io is an open source web page change detection, website watcher, restock monitor and notification service. There is a Server Side Template Injection (SSTI) in Jinja2 that allows Remote Command Execution on the server host. Attackers can run any system command without any restriction and they could use a reverse shell. The impact is critical as the attacker can completely takeover the server machine. This can be reduced if changedetection is behind a login page, but this isn't required by the application (not by default and not enforced).

Record
EUVD-2024-2939
CVSS 3.1
10.0 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-4r7v-whpg-8rx3 10.0

changedetection.io has a Server Side Template Injection using Jinja2 which allows Remote Command Execution

Summary

A Server Side Template Injection in changedetection.io caused by usage of unsafe functions of Jinja2 allows Remote Command Execution on the server host.

Details

changedetection.io version: 0.45.20

docker images
REPOSITORY                            TAG       IMAGE ID       CREATED        SIZE
dgtlmoon/changedetection.io           latest    53529c2e69f1   44 hours ago   423MB

The vulnerability is caused by the usage of vulnerable functions of Jinja2 template engine.

from jinja2 import Environment, BaseLoader
...
    # Get the notification body from datastore
    jinja2_env = Environment(loader=BaseLoader)
    n_body = jinja2_env.from_string(n_object.get('notification_body', '')).render(**notification_parameters)
    n_title = jinja2_env.from_string(n_object.get('notification_title', '')).render(**notification_parameters)

PoC

  1. Create/Edit a URL watch item
  2. Under Notifications tab insert this payload:
{{ self.__init__.__globals__.__builtins__.__import__('os').popen('id').read() }}

  1. See Telegram (or other supported messaging app) notification

Impact

In the PoC I've used id as payload and Telegram to read the result.
Attackers can run any system command without any restriction and they don't need to read the result in the notification app (e.g. they could use a reverse shell). The impact is critical as the attacker can completely takeover the server host. This can be reduced if changedetection access is protected by login page with a password, but this isn't required by the application (not by default and not enforced).

References

Credits

Edoardo Ottavianelli

Record
GHSA-4r7v-whpg-8rx3
CVSS 3.1
10.0 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Weakness
CWE-1336
Updated
2026-11-02
NVD 10.0

changedetection.io is an open source web page change detection, website watcher, restock monitor and notification service. There is a Server Side Template Injection (SSTI) in Jinja2 that allows Remote Command Execution on the server host. Attackers can run any system command without any restriction and they could use a reverse shell. The impact is critical as the attacker can completely takeover the server machine. This can be reduced if changedetection is behind a login page, but this isn't required by the application (not by default and not enforced).

Record
CVE-2024-32651
CVSS 3.1
10.0 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Weakness
CWE-1336
Updated
2026-11-02
OSV 10.0

Server Side Template Injection in Jinja2 allows Remote Command Execution

changedetection.io is an open source web page change detection, website watcher, restock monitor and notification service. There is a Server Side Template Injection (SSTI) in Jinja2 that allows Remote Command Execution on the server host. Attackers can run any system command without any restriction and they could use a reverse shell. The impact is critical as the attacker can completely takeover the server machine. This can be reduced if changedetection is behind a login page, but this isn't required by the application (not by default and not enforced).

Record
CVE-2024-32651
CVSS 3.1
10.0 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Weakness
CWE-1336
Updated
2026-11-02
OSVGHSA-4r7v-whpg-8rx3 10.0

changedetection.io has a Server Side Template Injection using Jinja2 which allows Remote Command Execution

Summary

A Server Side Template Injection in changedetection.io caused by usage of unsafe functions of Jinja2 allows Remote Command Execution on the server host.

Details

changedetection.io version: 0.45.20

docker images
REPOSITORY                            TAG       IMAGE ID       CREATED        SIZE
dgtlmoon/changedetection.io           latest    53529c2e69f1   44 hours ago   423MB

The vulnerability is caused by the usage of vulnerable functions of Jinja2 template engine.

from jinja2 import Environment, BaseLoader
...
    # Get the notification body from datastore
    jinja2_env = Environment(loader=BaseLoader)
    n_body = jinja2_env.from_string(n_object.get('notification_body', '')).render(**notification_parameters)
    n_title = jinja2_env.from_string(n_object.get('notification_title', '')).render(**notification_parameters)

PoC

  1. Create/Edit a URL watch item
  2. Under Notifications tab insert this payload:
{{ self.__init__.__globals__.__builtins__.__import__('os').popen('id').read() }}

  1. See Telegram (or other supported messaging app) notification

Impact

In the PoC I've used id as payload and Telegram to read the result.
Attackers can run any system command without any restriction and they don't need to read the result in the notification app (e.g. they could use a reverse shell). The impact is critical as the attacker can completely takeover the server host. This can be reduced if changedetection access is protected by login page with a password, but this isn't required by the application (not by default and not enforced).

References

Credits

Edoardo Ottavianelli

Record
GHSA-4r7v-whpg-8rx3
CVSS 3.1
10.0 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Weakness
CWE-1336
Updated
2026-11-02
OSVPYSEC-2026-310 10.0

changedetection.io has a Server Side Template Injection using Jinja2 which allows Remote Command Execution

Summary

A Server Side Template Injection in changedetection.io caused by usage of unsafe functions of Jinja2 allows Remote Command Execution on the server host.

Details

changedetection.io version: 0.45.20

docker images
REPOSITORY                            TAG       IMAGE ID       CREATED        SIZE
dgtlmoon/changedetection.io           latest    53529c2e69f1   44 hours ago   423MB

The vulnerability is caused by the usage of vulnerable functions of Jinja2 template engine.

from jinja2 import Environment, BaseLoader
...
    # Get the notification body from datastore
    jinja2_env = Environment(loader=BaseLoader)
    n_body = jinja2_env.from_string(n_object.get('notification_body', '')).render(**notification_parameters)
    n_title = jinja2_env.from_string(n_object.get('notification_title', '')).render(**notification_parameters)

PoC

  1. Create/Edit a URL watch item
  2. Under Notifications tab insert this payload:
{{ self.__init__.__globals__.__builtins__.__import__('os').popen('id').read() }}

  1. See Telegram (or other supported messaging app) notification

Impact

In the PoC I've used id as payload and Telegram to read the result.
Attackers can run any system command without any restriction and they don't need to read the result in the notification app (e.g. they could use a reverse shell). The impact is critical as the attacker can completely takeover the server host. This can be reduced if changedetection access is protected by login page with a password, but this isn't required by the application (not by default and not enforced).

References

Credits

Edoardo Ottavianelli

Record
PYSEC-2026-310
CVSS 3.1
10.0 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
changedetection-io
PyPI
 through 0.45.20
0.45.21
changedetection-io
PyPI
 before 0.45.21, 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
0.45.21

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
SourceLinkDate
NucleiChange Detection - Server Side Template Injection
PoC in GitHubs0ck3t-s3c/CVE-2024-32651-changedetection-RCE2024-09-16
PoC in GitHubzcrosman/cve-2024-326512024-05-26

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, Nuclei, NVD, OSV, PoC in GitHub

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

In short

CVE-2024-32651 is a critical vulnerability (CVSS 10.0) in Dgtlmoon Changedetection.io, published April 25, 2024. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 85.3%, the 99th percentile. Fixed in changedetection-io 0.45.21.

References

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