GHSA-vhm8-wwrf-3gcw · 深刻度： medium · エコシステム： composer — Path Traversal Vulnerability in `LESS` Parser allows reading of sensitive server files
flarum is a forum software package for building communities. In versions prior to 1.7.0 an admin account which has already been compromised by an attacker may use a vulnerability in the `LESS` parser which can be exploited to read sensitive files on the server through the use of path traversal techniques. An attacker can achieve this by providing an absolute path to a sensitive file in the custom `LESS` setting, which the `LESS` parser will then read. For example, an attacker could use the following code to read the contents of the `/etc/passwd` file on a linux machine. The scope of what files are vulnerable will depend on the permissions given to the running flarum process. The vulnerability has been addressed in version `1.7`. Users should upgrade to this version to mitigate the vulnerability. Users unable to upgrade may mitigate the vulnerability by ensuring that their admin accounts are secured with strong passwords and follow other best practices for account security. Additionally, users can limit the exposure of sensitive files on the server by implementing appropriate file permissions and access controls at the operating system level.
総合評価: CVE-2023-27577 は中リスク（45.1/100）。CVSS 深刻度は中。悪用される可能性が高い（EPSS 0.85%、53 パーセンタイル） 推奨対応: 影響資産を整理し、修補計画に組み込んでください。
リスクは変動します。再評価に基づき、本ページの表示内容を更新しています。
EPSS は日次で悪用されやすさの相対度合いを推定します。パーセンタイルは採点済み CVE の中での相対位置（高いほど相対的に深刻）を示します。
| # | 日付 | 旧 EPSS スコア | 新 EPSS スコア | Δ（新 − 旧） |
|---|---|---|---|---|
| 1 | 2026-06-16 | 0.84% | 0.85% | +0.01% |
| 2 | 2026-06-15 | 0.12% | 0.84% | +0.72% |
| 3 | 2026-05-22 | — | 0.12% | — |
EPSS の全履歴 （全 14 件）
この CVE の CVSS 指標。
| ベーススコア | バージョン | 深刻度 | ベクトル | 悪用しやすさ | 影響 | スコアの出典 |
|---|---|---|---|---|---|---|
| 6.6 | 3.1 | MEDIUM |
|
2.3 | 3.7 | [email protected] |
| 4.9 | 3.1 | MEDIUM |
|
1.2 | 3.6 | [email protected] |
GHSA-vhm8-wwrf-3gcw · 深刻度： medium · エコシステム： composer — Path Traversal Vulnerability in `LESS` Parser allows reading of sensitive server files