CVE-2023-49277 Reflected Cross-site Scripting Vulnerability in dpaste
Attackers can execute arbitrary JavaScript in user browsers via the expires parameter, leading to data theft or unauthorized access.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2023-49277?
CVE-2023-49277 is a high-severity cross-site scripting vulnerability in DarrenOfficial dpaste, published on 1 Dec 2023. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
dpaste is an open source pastebin application written in Python using the Django framework. A security vulnerability has been identified in the expires parameter of the dpaste API, allowing for a POST Reflected XSS attack. This vulnerability can be exploited by an attacker to execute arbitrary JavaScript code in the context of a user's browser, potentially leading to unauthorized access, data theft, or other malicious activities. Users are strongly advised to upgrade to dpaste release v3.8 or later versions, as dpaste versions older than v3.8 are susceptible to the identified security vulnerability. No known workarounds have been identified, and applying the patch is the most effective way to remediate the vulnerability.
Weakness: CWE-79
Which versions are affected by CVE-2023-49277?
3 open source packages ship an affected version, including dpaste and Dpaste. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
dpaste PyPI | All versions | 3.8 |
dpaste PyPI | All versions | 3.8 |
Dpaste PyPI | All versions | 3.8 |
Products include Darrennathanael Dpaste.
How do I fix CVE-2023-49277?
Upgrade dpaste to 3.8 or later.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2023-49277 being exploited?
There is no known exploitation of CVE-2023-49277 in the wild and no public exploit code.
Sources
Also known as GHSA-r8j9-5cj7-cv39, PYSEC-2026-1317.