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    2,071,106 files checkedFiles from Modrinth and CurseForge we downloaded and checked. Counted on 26 Oct 2026.647,557 files with their code readFiles whose code we turned back into readable code and read, in an isolated environment. Counted on 26 Oct 2026.270,404 projects gradedProjects with a letter from A to F. Counted on 26 Oct 2026.

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    © 2026 ModgradeNot an official Minecraft product. Not approved by or associated with Mojang or Microsoft.

    Log4JPatcher

    Mod

    A patch that helps protect your game from Log4j security flaws.

    Download

    Files come from CurseForge servers.

    Log4jPatcher-1.0.1.jar

    Released 11 Dec 2021 · 179.4 KB

    Passed: our checks found nothing harmful in this file.

    Download
    E41/ 100
    Security
    Passed
    Privacy
    None found
    Loaders
    Fabric, Forge
    Minecraft versions
    Up to 1.18.1
    • OverviewE
    • SecurityPassed
    • PrivacyNone found
    • AINone found
    • CompatibilityUp to 1.18.1
    • ModpacksIn 13
    • ReleasesLatest Dec 2021
    OverviewSecurityPrivacyAICompatibilityModpacksReleases

    Why grade E

    How grades work

    Strengths

    • Security checks passed
    • Stable releases
    • Public source code

    Points lost

    • No release in 4.9 years−26 points
    • No file for a Minecraft version most modpacks use−9 points
    • Under 5 million downloads−1 point
    All 11 criteria

    • Maintenance

      27 points lost0 / 27
      Last releaseHow long ago the newest file came out, or an existing file was marked as working on a new Minecraft version.4.9 years ago (11 Dec 2021) 0 / 12
      Supports popular versionsWhether the project has a file for a Minecraft version that 15% or more of the popular mods updated in the last 6 months also support. A version many modpacks use, like 1.20.1 or 1.21.1, also counts after a release in the last 12 months.1.18.1 on Fabric and Forge. About 4.8 years behind popular modding versions. Latest Minecraft: 26.3. Abandoned: no release for 4.8 years; no file for a popular modding version.0 / 9
      Regular releasesIn how many of the last 24 months a new file came out. Full points at 8 months.No release in the last 24 months 0 / 6

    • Stability

      Full points15 / 15
      Removed from modpacksHow many modpacks removed it in a later version of the pack. We can only see this in modpacks with two or more versions. A pack that swaps it for another edition of the same project, or that is rebuilt from scratch, does not count.2 of the 11 modpacks with two or more versions removed it in a later one (18%) 10 / 10
      Quick fixesHow often a release needed a quick fix: a new release within 3 days to fix a problem in it.Not measured yet.
      Known conflictsHow many projects say they do not work with it, compared with how widely it is used. Packs, small projects, forks, ports, add-ons, alternatives and old versions do not count.None 5 / 5

    • Transparency

      Full points7 / 7
      Source codeWhether the project page links to its source code, so anyone can read what it does.GitHub · CreeperHost/Log4jPatcher 7 / 7
      Place to report problemsWhether the project page links to a place where players can report problems: an issue tracker.Does not apply. Not counted for projects only on CurseForge.

    • Popularity

      1 point lost3 / 4
      DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.82,237 3 / 4

    • Track record

      8 points lost0 / 8
      AgeHow long the project has existed. It counts less when no new file came out recently.4.9 years, 2 releases 0 / 8

    • Security

      Passed
      File checksThis check adds no points. It can only take points away.Our checks found nothing harmful in the latest file. See Security
    Total41 / 100

    24.9 of the 61 points that apply = 41 out of 100. The points above are rounded to whole numbers.

    About

    Log4JPatcher is a Java agent that mitigates Log4j2 JNDI exploits, including the Log4Shell vulnerabilities, in Minecraft environments. It applies two patches: it disables lookup conversions in the message pattern converter on supported Log4j versions and makes the JNDI lookup class return null. The agent is loaded as a JVM launch argument, providing mitigation for setups whose Log4j version cannot use the standard no-lookups setting, including older Minecraft environments.

    Written from CurseForge and the GitHub README . How we write it

    In-game changes

    It has no file for a recent Minecraft version. This is about its files for Minecraft 1.0 to 1.18.1.

    Does not change the game's code directly.

    Adds no new blocks, items or other content.

    Keeps all of vanilla Minecraft's textures, models and sounds.

    Details

    Creators
    CreeperHost, Jake_Evans, gigabit101, covers1624 and CloudyPSP
    License
    Not known
    Downloads
    82K
    Created
    10 Dec 2021
    Official page
    CurseForge
    Links
    Source code

    Security

    No harmful code found

    It has no file for a recent Minecraft version. This is about its files for Minecraft 1.0 to 1.18.1.

    We checked its files and read their code, without running it.

    Why we show this: a mod runs on your computer like any program, so harmful code in it can take your accounts or files. Our checks look for known signs of harm. They cannot prove that a file is harmless. In the grade: malware means no grade, and a Warning in a latest file for a recent Minecraft version lowers it.

    How we checked · The latest file checked, last on 16 Oct 2026
    • FilesWe download the files from Modrinth or CurseForge and look at what is inside them and what their code can do, without running them. Fixed rules tell what is harmful.
      1 latest file. It is not for a recent Minecraft version, so the answer above is about it. Recent versions: those released in the last 2 years, plus 1.20.1 and 1.21.1, among the most played in modpacks. See each file in Releases
    • Their codeWe turn the code of the files back into readable code and follow what it does, without running it. This shows what it downloads, what it sends and where your login goes.
      Read without running it
    • Looked for, not foundWe looked for these in the file and did not find them.
      The internet, folders outside the game, other programs, updating itself, the webcam or microphone, an AI service.

    Privacy

    We found nothing it sends

    It has no file for a recent Minecraft version. This is about its files for Minecraft 1.0 to 1.18.1.

    We read its code without running it: it contacts no web address while you play.

    Why we show this: a mod can send things about you over the internet, like your player name or your login. Contacting an address to check for updates or download files sends nothing about you. Not in the grade: sending data can be normal for what a mod does.

    How we checked · Its one file read
    • Files readWe read the code without running it. We list each web address the code contacts while you play, and what it sends. Code that is never used is left out.
      The code of its one file, for Minecraft 1.0 to 1.18.1. See each file in Releases

    AI

    No sign so far that AI was used to make it

    We looked for AI tools in its description, files and images and found none.

    We have not read its changelogs and code history yet.

    No sign of AI in the game

    We found no AI service, AI library or AI model file in its code.

    Why we show this: some players and servers avoid projects made with AI, and AI in the game can send what you write to an online service. Not in the grade: using AI does not tell whether a project works well or is kept up to date.

    How we checked · 4 places read
    • Author on ModrinthThe disclosure form on Modrinth. Since 13 Aug 2026, Modrinth's rules require it when a substantial part of the code is AI output, when an asset is mainly AI output, or when the project or its page relies on generative AI.
      Not on Modrinth.
    • Code historyThe public code on GitHub: who made each change, credit lines such as "Co-authored-by", and its files.
      Not read yet
    • Description and changelogsThe description, project page and newest changelogs: sentences saying an AI tool was used, and text pasted from an AI chat.
      Nothing found in the description
      Changelogs not read yet
    • Its filesFiles that AI coding tools leave behind (like AGENTS.md), and the texts inside the files you download.
      Nothing found
    • Images in its filesHidden data in the images of the files you download, where AI image tools write their name and settings.
      Nothing found
    • Code of the modThe code and files of the mod, read without running it: addresses of AI services, AI libraries, AI model files and a place for your own AI key.
      No AI service, AI library or AI model file
      79 code files read

    Compatibility

    See all 2 files
    Fabric
    Forge
    1.01.61.91.151.2026.1

    Point at or tap a version to see its loaders.

    RequiresProjects you must also install for it to work. From the author's lists for its files for recent Minecraft versions, or from its project page.Nothing
    OptionalProjects it can work with but does not need. The author lists them.Nothing
    IncludesProjects packed inside its files.Nothing
    Speed of updatesHow fast it gets a file for new Minecraft versions, on average, compared with similar projects. Not part of the grade.No file yet for any of the last 6 Minecraft versions.

    Modpacks using this project

    Find modpacks with it

    Modpacks that include Log4JPatcher in at least one of their versions, most downloaded first.

    ModpackDownloadsLast version with it
    Advent Renewed2K downloadslast version with it 3 Nov 2025Opti-Beauty1.7K downloadslast version with it 21 Mar 2022PlumoMC-Heroes1.2K downloadslast version with it 29 Aug 2022Gotta Play With Trains of old1K downloadslast version with it 26 Jun 2024EchoFrames582 downloadslast version with it 22 Jan 2026UI (Info) Augments339 downloadslast version with it 3 Jun 2022EatEveryChicken's Adventure Tech265 downloadslast version with it 12 Feb 2023TOTH 3229 downloadslast version with it 6 Jan 2022Space Wizardry201 downloadslast version with it 26 Jan 2023MTTA135 downloadslast version with it 21 Jul 2024
    1 to 10 of 1312

    Latest files

    The newest file for each Minecraft version and loader. None is for a recent Minecraft version. Recent versions: those released in the last 2 years, plus 1.20.1 and 1.21.1, among the most played in modpacks.

    MinecraftLoaderVersionSecuritySendsRequires
    Older Minecraft versions
    1.0 to 1.18.1·Fabric, Forge1.0.11.0.1 · Log4jPatcher-1.0.1.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.

    2 releases

    MinecraftLoaderVersionReleasedSecurityGet it onDownload
    1.0 to 1.18.11.0 to 1.18.1The latest file for its Minecraft version and loader·Fabric, Forge1.0.11.0.1 · Log4jPatcher-1.0.1.jar·11 Dec 2021PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on CurseForgeDownload · Stable · 179.4 KB
    1.0 to 1.18.11.0 to 1.18.1·Fabric, ForgeLog4jPatcher-1.0.0Log4jPatcher-1.0.0 · Log4jPatcher-1.0.0.jar·10 Dec 2021PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on CurseForgeDownload · Stable · 179.7 KB