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Bug bounty reports15,219

Publicly disclosed HackerOne reports, with the platform's own outcome and severity.

Program:Valve
Status
Severity:Medium
Clear
Weakness
Year
Bounty paid14
Access stated
  • No account0
  • A user account0
  • Admin or privileged0
Access needed
Technique
Clear filters27 of 15,219 reports
Disclosed bug bounty reports
ReportStatusWeaknessSeverityDisclosedBountyVotes
MySQL username and password leaked in developer.valvesoftware.com via source code dislosureAnalysed#291057ValidAuthenticationMedium2018-05-07–123
ImageMagick GIF coder vulnerability leading to memory disclosureAnalysed#315256ValidInformation DisclosureMedium2018-07-02–86
[steam client] Opening a specific steam:// url overwrites files at an arbitrary locationAnalysed#667242ValidMemory CorruptionMedium2020-09-22$75080
Steam chat - trade offer presentation vulnerabilityAnalysed#745447ValidInput Validation and LogicMedium2020-02-19–60
Link filter protection bypassAnalysed#291750ValidOpen RedirectMedium2018-05-09–55
Stored XXS @ https://steamcommunity.com/search/users/#text= via Profile NameAnalysed#351171ValidCross-site ScriptingMedium2018-05-24$75042
Arbitrary file creation with semi-controlled content (leads to DoS, EoP and others) at Steam Windows Client#682774ValidFile and Path HandlingMedium2019-09-26$1,25041
Stored XSS in the guide's GameplayVersion (www.dota2.com)Analysed#380045ValidCross-site ScriptingMedium2019-01-07$75036
Read Access to all comments on unauthorized forums' discussions! IDOR!Analysed#308610ValidInsecure Direct Object ReferenceMedium2018-05-09$50034
Buffer overflows in demo parsingAnalysed#350119ValidMemory CorruptionMedium2018-08-28–33
Xss was found by exploiting the URL markdown on http://store.steampowered.comAnalysed#313250ValidCross-site ScriptingMedium2018-05-09$1,00032
Reflected XSS in www.dota2.comAnalysed#292457ValidCross-site ScriptingMedium2018-05-09–32
Hidden scheduled partner events are propagated to Steam clients in CMsgClientClanStateAnalysed#780167ValidInformation DisclosureMedium2020-03-20–31
Malformed map detailed texture files in GoldSrc games lead to Remote Code ExecutionAnalysed#505173ValidMemory CorruptionMedium2019-09-17$35030
code injection, steam chat clientAnalysed#411329ValidCommand and Code InjectionMedium2019-01-07$75028
unlock self-lock by brute forceAnalysed#410221ValidAuthenticationMedium2019-01-23$90027
GetReports works for hubs you don't have access toAnalysed#350937ValidInformation DisclosureMedium2018-05-30$75024
Privilege Escalation vulnerability in steam's Remote Play feature leads to arbitrary kernel-mode driver installationAnalysed#852091ValidAccess ControlMedium2021-09-21–23
[CS 1.6] Map cycle abuse allows arbitrary file read/writeAnalysed#590279ValidAccess ControlMedium2021-02-22$75022
GetGlobalAchievementPercentagesForApp is missing the same release checks as GetSchemaForGameAnalysed#541020ValidInformation DisclosureMedium2020-02-19–22
resetreportedcount & updatetags doesn't verify appid paramAnalysed#351106ValidAuthenticationMedium2018-07-02$75019
Reflected XSS on help.steampowered.comAnalysed#390429ValidCross-site ScriptingMedium2019-01-07–16
Aapp name leakage on economy history pageAnalysed#349681ValidInformation DisclosureMedium2018-05-24–16
ajaxgetachievementsforgame is not guarded for unreleased appsAnalysed#835087ValidInformation DisclosureMedium2020-07-30$75014
Malformed .WAV triggers an Access Violation on GoldSRC (hl.exe)Analysed#495789ValidMemory CorruptionMedium2020-02-27–14
XSS @ store.steampowered.com via agecheck path nameAnalysed#406704ValidCross-site ScriptingMedium2019-01-07$75014
Unfiltered input allows for XSS in "Playtime Item Grants" fields#353334ValidCross-site ScriptingMedium2018-05-24–13

Status and severity are HackerOne's. “Access stated” is what the title says; “Access needed” and techniques come from CyberSIXT's analysis of the public report, where there is one, which can be wrong. Data as of 2026-11-15.