bug-bounty404
google392
xss350
microsoft305
facebook274
apple184
exploit182
rce174
malware136
cve107
account-takeover94
csrf86
browser85
writeup69
privilege-escalation66
phishing61
dos60
react59
supply-chain56
bragging-post55
authentication-bypass53
node51
cloudflare51
ssrf49
docker48
aws48
access-control46
reverse-engineering45
smart-contract45
web344
ethereum43
defi42
pentest41
oauth41
sql-injection40
idor35
lfi35
race-condition33
info-disclosure33
smart-contract-vulnerability32
cloud31
buffer-overflow30
wordpress29
auth-bypass29
clickjacking29
subdomain-takeover27
solidity27
vulnerability-disclosure25
web-application24
sqli23
0
8/10
vulnerability
A critical censorship vulnerability in Optimism's sequencer was discovered where the absence of chain ID validation in the rate limiter allowed attackers to replay signed transactions from other chains to indefinitely rate-limit specific accounts on Optimism Mainnet, affecting ~1.3 million accounts including major protocols and bridge operators. The bug enabled selective transaction censorship without on-chain evidence, posing significant risk to network availability and DeFi operations.
rate-limiting
censorship
sequencer
chain-id-validation
transaction-replay
denial-of-service
layer-2
optimism
bug-disclosure
eip-155
json-rpc
Optimism Labs
Bernard Wagner
iosiro
proxyd
LayerZero
Across
Synapse
Hop Bridge
LayerSwap
Aave
Uniswap
Immunefi
EIP-155
Dune Analytics