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Response snapshot Oct 27, 2026, 17:26 UTC

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VulnerabilityCVE-2024-32651

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

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.

At a glance

Exploited
Not known
Severity
10.0 Critical (CVSS 3.1)
Chance of exploitation
Not estimated
Sources
1 source

What to do

GitHub lists first patched versions: changedetection.io: 0.45.21. Confirm the affected range and upgrade guidance in the exact advisory.

Read GitHub-reviewed advisory GHSA-4r7v-whpg-8rx3 (opens a new tab)

What happened

### 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. ```python 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) ```

Continue reading

### PoC 1. Create/Edit a URL watch item 2. Under *Notifications* tab insert this payload: ```python {{ self.__init__.__globals__.__builtins__.__import__('os').popen('id').read() }} ``` ![Screenshot from 2024-04-19 15-46-04](https://github.com/dgtlmoon/changedetection.io/assets/35783570/b6a5779f-fd1e-4708-9b2d-21cb97f0bb4f)

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

![Screenshot from 2024-04-19 16-02-12](https://github.com/dgtlmoon/changedetection.io/assets/35783570/20877919-d6fe-49f1-bbd2-586e900207f1)

### 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 - https://www.hacktivesecurity.com/blog/2024/05/08/cve-2024-32651-server-side-template-injection-changedetection-io/ - https://book.hacktricks.xyz/pentesting-web/ssti-server-side-template-injection/jinja2-ssti - https://www.onsecurity.io/blog/server-side-template-injection-with-jinja2/ - https://docs.cobalt.io/bestpractices/prevent-ssti/

### Credits

Edoardo Ottavianelli

Affected package ranges reported by GitHub: changedetection.io: <= 0.45.20

Scores and how they were measured

CVSS base severity

10.0

Version 3.1As of

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Measurement source (opens a new tab)

How bad it is if exploited. Not a prediction of exploitation or proof you are exposed.

EPSS probability

Not available

A model's estimate of exploitation in the next 30 days, not certainty or your own risk.

Related technology

Sources

  1. Primary source

    GitHub-reviewed advisory GHSA-4r7v-whpg-8rx3 (opens a new tab)

    The public advisory supplies the description, affected package/version ranges, and any listed CVSS metric. GitHub review is not local review.

    Published Checked

  2. Primary source

    GitHub public advisory API page (opens a new tab)

    The API page supplied GHSA-4r7v-whpg-8rx3, its actual identifiers, source dates, and structured metrics.

    Published Date not suppliedChecked

Cite this record

For factual claims, cite the primary sources above; cite KEVWire for its compilation, dates, and classifications.

APA

KEVWire. (2026, October 27). changedetection.io has a Server Side Template Injection using Jinja2 which allows Remote Command Execution (CVE-2024-32651). https://kevwire.com/record/CVE-2024-32651

MLA

"changedetection.io has a Server Side Template Injection using Jinja2 which allows Remote Command Execution (CVE-2024-32651)." KEVWire, 27 Oct. 2026, kevwire.com/record/CVE-2024-32651.

Chicago

KEVWire. "changedetection.io has a Server Side Template Injection using Jinja2 which allows Remote Command Execution (CVE-2024-32651)." Last modified October 27, 2026. https://kevwire.com/record/CVE-2024-32651.

Evidence summary (plain text)

changedetection.io has a Server Side Template Injection using Jinja2 which allows Remote Command Execution (Oct 15, 2024).
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.
```python
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)
```
CVSS 10.0 (version 3.1; evidence as of Oct 27, 2026; https://github.com/advisories/GHSA-4r7v-whpg-8rx3).
Sources:
GitHub-reviewed advisory GHSA-4r7v-whpg-8rx3: https://github.com/advisories/GHSA-4r7v-whpg-8rx3
GitHub public advisory API page: https://api.github.com/advisories?type=reviewed&per_page=100&sort=updated&direction=desc
Record ID: CVE-2024-32651.
Record origin: Ingested record.
AI evidence: Not assessed.
Known exploitation: Not assessed.
Zero-day status: Not assessed. KEV membership alone does not establish zero-day status.
About this data

This record was ingested from a data source. Retrieved: Oct 27, 2026, 17:25 UTC. Ingestion is not an independent editorial investigation.

A CISA KEV listing documents known exploitation, not necessarily a zero-day; absence from the catalog does not prove a vulnerability has never been exploited.

Technology tags indicate possible relevance, not verified exposure. Confirm the affected product, version, and configuration against your own inventory; KEVWire does not scan your systems.

A personal reading checklist on this device, not verified remediation.

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Record details

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