bug-bounty408
google401
xss352
microsoft316
facebook286
exploit192
apple187
rce176
malware148
cve111
account-takeover96
browser89
csrf86
writeup71
privilege-escalation66
phishing63
dos60
react60
supply-chain58
bragging-post55
authentication-bypass54
node51
cloudflare51
ssrf50
docker48
aws48
access-control46
reverse-engineering46
smart-contract45
web345
ethereum43
oauth42
defi42
pentest41
sql-injection40
idor36
lfi36
info-disclosure35
race-condition34
cloud32
smart-contract-vulnerability32
auth-bypass31
buffer-overflow31
wordpress30
clickjacking29
subdomain-takeover27
solidity27
vulnerability-disclosure25
cors24
web-application24
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