ExploitFixer - Anti-Crash/Dupe Plugin v4.0.4

Protect your server from crash/dupe/packet exploits with the ultimate security fix plugin.
  • Improved handling of ItemAnalysis by updating inventory data before click packet
  • Removed ItemAnalysis alternative updaters to 100% depend on tthe pre-click update which is more precise
  • Fixed some other errors and issues caused in some server versions
  • Augmented default item flags limits to avoid false detections on servers with big items
  • Fix item analysis error with potion data.
  • Restrict item analysis to only work in non-creative gamemode.
  • Only fix creative items if the variable is writable.
  • Increased default max extra flags. (1 -> 16)
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--- [!] UPDATE WARNING [!] ---
> DELETE EXPLOITFIXER FOLDER OR THE PLUGIN WONT WORK <

  • Completely recoded entire plugin for more stability and performance.
  • Added more than 25 languages for better localization support.
  • Improved security with more secure sign exploit handling.
  • Limited the length of packet play in tab complete to prevent abuse.
  • Added checks for invalid packet sequences to prevent certain types of crashers.
  • Added Folia support (beta test, please provide feedback on Discord).
  • Blocked spamming of throwing lingering potions by adding a cooldown.
  • Added a registry and logs for recently detected players.
  • Enhanced the creative sanitizer with more advanced features.
  • Completely remade item analysis from scratch for better precision, making it effective against powerful exploits.
  • Fixed IOOB happening randomly on some server setups.
  • Fixed items not dropping when a plugin messes up with them.
New Features

  • Added configuration option to make renaming containers configurable.
  • Introduced the ability to enable/disable invalid inventory checks in the configuration file.
  • Added a configurable limit on how many books a player can store in a chest or container.
  • Added an option to ban players for sending oversized packets, configurable in the settings.
Improvements

  • Changed the message displayed when opening an invalid inventory, now customizable via configuration.
  • Improved debugging: null packets are now displayed as PacketPlayInOther in debug logs for better clarity.
Bug Fixes

  • Fixed an exploit where spamming the creation of creative items allowed bypassing creative item restrictions.
  • Resolved an issue with .DS_Store files being considered in language files; they are now ignored.
  • Fixed a duplication exploit involving donkeys and portals.
Added extra flag checks for higher security, with 8 new parameters:
  • Total Flags
  • Extra Flags
  • Translate Flags
  • Separator Flags
  • Object Flags
  • Array Flags
  • Translate Placeholder Flags
  • Firework Flags
(Please reset your config.yml)
This new update can cause issues on some servers. Please contact me on Discord if you encounter issues so we can update the plugin and launch a fix.

Thank you!
  • Added exploit dupe protection for dropping/editing books and then disconnecting. (Cooldowns for dropping items and editing books)
  • More improvements to inventory check and advanced checks for higher security.
DISCLAIMER: You must reset your config.yml to get the new inventory check settings and avoid errors.
Buy a license now
$13.99
EULA
Standard EULA
Use on any projects you own with attribution
Support
Standard
Includes:
Download the resource
Access new updates
Support from the creator
Support duration
Lifetime
Extras
Source Code
+ $49.99
Share and earn
Refer this resource and earn a 20% commission.
246,679 Views
3,133 Purchases
3,075 Downloads
Jan 2, 2023 Published
Jul 5, 2026 Updated
5.00 star(s)
Average rating (45)
506.3 KB File size
Open source
  1. No
DRM-free
  1. Yes
Unobfuscated
  1. Yes
Type
  1. Protection
  1. Staff
  1. Patch
Supported software
  1. Bukkit
  1. Spigot
  1. Paper
  1. Folia
Supported versions
  1. 26.1
  1. 1.21.11
  1. 1.21.8
  1. 1.21.5
  1. 1.21.4
  1. 1.21.2
  1. 1.21
  1. 1.20
  1. 1.19
  1. 1.18
  1. 1.17
  1. 1.16
  1. 1.15
  1. 1.14
  1. 1.13
  1. 1.12
  1. 1.11
  1. 1.10
  1. 1.9
  1. 1.8
Supported languages
  1. English
  1. Spanish
  1. Russian
  1. German
  1. French
  1. Portugese
  1. Polish
  1. Turkish
  1. Chinese
  1. Indonesian
  1. Italian
  1. Vietnamese
  1. Dutch
  1. Korean
  1. Czech
  1. Thai
  1. Hungarian
  1. Arabic
  1. Japanese
  1. Ukrainian
  1. Swedish
  1. Danish
  1. Romanian
  1. Slovak
  1. Hebrew
Includes DRM
No
Source access (legacy)
Closed source & unobfuscated
Creator
Owner
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Share and earn
Refer this resource and earn a 20% commission.
246,679 Views
3,133 Purchases
3,075 Downloads
Jan 2, 2023 Published
Jul 5, 2026 Updated
5.00 star(s)
Average rating (45)
506.3 KB File size
Open source
  1. No
DRM-free
  1. Yes
Unobfuscated
  1. Yes
Type
  1. Protection
  1. Staff
  1. Patch
Supported software
  1. Bukkit
  1. Spigot
  1. Paper
  1. Folia
Supported versions
  1. 26.1
  1. 1.21.11
  1. 1.21.8
  1. 1.21.5
  1. 1.21.4
  1. 1.21.2
  1. 1.21
  1. 1.20
  1. 1.19
  1. 1.18
  1. 1.17
  1. 1.16
  1. 1.15
  1. 1.14
  1. 1.13
  1. 1.12
  1. 1.11
  1. 1.10
  1. 1.9
  1. 1.8
Supported languages
  1. English
  1. Spanish
  1. Russian
  1. German
  1. French
  1. Portugese
  1. Polish
  1. Turkish
  1. Chinese
  1. Indonesian
  1. Italian
  1. Vietnamese
  1. Dutch
  1. Korean
  1. Czech
  1. Thai
  1. Hungarian
  1. Arabic
  1. Japanese
  1. Ukrainian
  1. Swedish
  1. Danish
  1. Romanian
  1. Slovak
  1. Hebrew
Includes DRM
No
Source access (legacy)
Closed source & unobfuscated
Creator
Owner
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