ET WEB_SPECIFIC_APPS Discourse Backup File Disclosure via Default Nginx Configuration (CVE-2024-53991)

SID: 2061123Rev: 337 viewsHistory

Sourceet/open

CreatedMarch 27, 2025

UpdatedMarch 28, 2025

Classificationweb-application-attack

alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS Discourse Backup File Disclosure via Default Nginx Configuration (CVE-2024-53991)"; flow:established,to_server; http.uri; content:"/stylesheets/discourse-"; startswith; http.header; content:"x-sendfile-type|3a 20|x-accel-redirect|0d 0a|"; fast_pattern; nocase; content:"x-accel-mapping|3a 20|"; nocase; content:"|3d 2f|downloads|2f|backups|2f|"; distance:0; reference:url,projectdiscovery.io/blog/discourse-backup-disclosure-rails-send_file-quirk; reference:cve,2024-53991; classtype:web-application-attack; sid:2061123; rev:3; metadata:attack_target Server, tls_state TLSDecrypt, created_at 2025_03_27, cve CVE_2024_53991, deployment Perimeter, deployment Internal, deployment SSLDecrypt, signature_severity Major, tag Exploit, updated_at 2025_03_28, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)

References

url	projectdiscovery.io/blog/discourse-backup-disclosure-rails-send_file-quirk
cve	2024-53991

Metadata

attack targetServer

tls stateTLSDecrypt

created at2025_03_27

cveCVE-2024-53991

deploymentSSLDecrypt

signature severityMajor

tagExploit

updated at2025_03_28

mitre tactic idTA0001

mitre tactic nameInitial_Access

mitre technique idT1190

mitre technique nameExploit_Public_Facing_Application

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