PT-2025-30607 · Unknown · Fastapi Guard

Dhki · Published 2025-07-23 · Updated 2025-07-24 · CVE-2025-54365

Positive Technologies (AI Summary)

CVSS v4.0

8.8

High

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions fastapi-guard versions 3.0.1

Description The regular expression patch intended to mitigate a ReDoS vulnerability failed to adequately limit input string length. Specifically, the patch did not account for cases where the attributes within a <script> tag exceeded 100 characters, allowing bypass of the regex patterns. This could potentially lead to attacks such as Cross-Site Scripting (XSS) and SQL Injection.

Recommendations fastapi-guard version 3.0.1: Upgrade to version 3.0.2 to address the issue.

Exploit

Fix

DoS

RCE

Weakness Enumeration

CWE-185

CWE-1333

CWE-20

Related Identifiers

CVE-2025-54365

GHSA-RRF6-PXG8-684G

Affected Products

Fastapi Guard

References · 11

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/54xxx/CVE-2025-54365.json · Exploit
• 🔥 https://github.com/rennf93/fastapi-guard/security/advisories/GHSA-rrf6-pxg8-684g · Exploit
• https://github.com/rennf93/fastapi-guard/commit/d9d50e8130b7b434cdc1b001b8cfd03a06729f7f · Patch
• https://github.com/rennf93/fastapi-guard/commit/0829292c322d33dc14ab00c5451c5c138148035a · Patch
• https://osv.dev/vulnerability/CVE-2025-54365 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-rrf6-pxg8-684g · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-54365 · Security Note
• https://github.com/rennf93/fastapi-guard · Note
• https://twitter.com/CVEnew/status/1948151375072055790 · Twitter Post
• https://twitter.com/VulmonFeeds/status/1948165189913686524 · Twitter Post
• https://t.me/CVEtracker/28525 · Telegram Post