Improper Output Neutralization for Logs vulnerability in Apache Log4cxx. When using HTMLLayout, logger names are not properly escaped when writing out to the HTML file. If untrusted data is used to retrieve the name of a logger, an attacker could theoretically inject HTML or Javascript in order to hide information from logs or steal data from the user. In order to activate this, the following sequence must occur: * Log4cxx is configured to use HTMLLayout. * Logger name comes from an untrusted string * Logger with compromised name logs a message * User opens the generated HTML log file in their browser, leading to potential XSS Because logger names are generally constant strings, we assess the impact to users as LOW This issue affects Apache Log4cxx: before 1.5.0. Users are recommended to upgrade to version 1.5.0, which fixes the issue.
総合評価: CVE-2025-54812 は低リスク(30.2/100)。CVSS 深刻度は低。悪用される可能性が高い(EPSS 1.08%、61 パーセンタイル) 推奨対応: 悪用情報と EPSS の推移を監視し、必要に応じて優先度を見直してください。
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 | 2026-06-15 | 0.58% | 1.08% | +0.50% |
| 2 | 2026-06-08 | 0.49% | 0.58% | +0.09% |
| 3 | 2026-05-18 | — | 0.49% | — |
EPSS の全履歴 (全 13 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 |
|---|---|---|---|---|---|---|
| 2.1 | 4.0 | LOW |
|
— | — | [email protected] |
| 5.4 | 3.1 | MEDIUM |
|
2.3 | 2.7 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2025-54812 not yet assigned priority: Debian including 1 source packages (log4cxx), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2025-54812 |
redhat
|
low | — | https://access.redhat.com/security/cve/CVE-2025-54812 |
ubuntu
|
medium | CVE-2025-54812 medium priority: Ubuntu including 1 source packages (log4cxx), 9 status rows across 9 suites (bionic, focal, jammy, noble, plucky, questing, trusty, upstream, xenial): needs-triage 7, ignored 1, released 1. | https://ubuntu.com/security/CVE-2025-54812 |
| URL | タグ |
|---|---|
| https://github.com/apache/logging-log4cxx/pull/509 | Issue Tracking Patch |
| https://github.com/apache/logging-log4cxx/pull/514 | Issue Tracking Patch |
| https://logging.apache.org/security.html#CVE-2025-54812 | Vendor Advisory |
| http://www.openwall.com/lists/oss-security/2025/08/22/2 | |
| https://lists.debian.org/debian-lts-announce/2025/10/msg00002.html |