# CVE-2023-27577: Path Traversal Vulnerability in `LESS` Parser allows reading of sensitive server files

Source: https://junglewise.ai/threats/cve-2023-27577-path-traversal-vulnerability-in-less-parser-allows-reading-of  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2023-03-13  
License: CC BY 4.0 with a link back

CVE-2023-27577 · Severity: low · CVSS 3.1 · Published 2023-03-13

Path Traversal Vulnerability in `LESS` Parser allows reading of sensitive server files

Technologies: [flarum/core (Packagist)](https://junglewise.ai/threats/technologies/flarum-core). Vendors: [Packagist](https://junglewise.ai/threats/vendors/packagist).

## Quick answers

**Is CVE-2023-27577 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2023-27577 being exploited in the wild.

**How severe is CVE-2023-27577?** Low severity, with a CVSS score of 3.1, published 13 March 2023.

**Which products and versions are affected?** flarum/core (Packagist) ECOSYSTEM:introduced=0,fixed=1.7.0.

**Is there a fix for CVE-2023-27577?** Yes. flarum/core (Packagist): upgrade to 1.7.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2023-27577?** Check whether you run flarum/core (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- flarum/core (Packagist): upgrade to 1.7.0 or later

  ```sh
  composer require flarum/core:^1.7.0
  ```


## Affected products

- flarum/core (Packagist) ECOSYSTEM:introduced=0,fixed=1.7.0

## Identifiers

- CVE-2023-27577
- GHSA-vhm8-wwrf-3gcw

## Related threats

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- [Flarum vulnerable to LFI and Blind SSRF via Avatar upload](https://junglewise.ai/threats/cve-2023-40033-flarum-vulnerable-to-lfi-and-blind-ssrf-via-avatar-upload)
- [Any Flarum user including unactivated can reply in public discussions whose first post was permanently deleted](https://junglewise.ai/threats/cve-2023-22489-any-flarum-user-including-unactivated-can-reply-in-public)