CVE-2024-55948Network attack vector

Anonymous page disruption via XHR cache poisoning

Published Feb 4, 2025 · Updated Feb 4, 2025

Cache poisoning in Discourse stable before 3.3.2 and tests-passed before 3.4.0.beta3 allows remote attackers to disrupt anonymous page responses. The anonymous response cache accepts a response produced by an attacker-crafted XHR request as a reusable entry, so later cache hits can omit preloaded data. The attack requires anonymous caching to be enabled, and its reported effects are limited to anonymous visitors.

CVSS severity8.2
High
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cache poisoning in Discourse stable before 3.3.2 and tests-passed before 3.4.0.beta3 allows remote attackers to disrupt anonymous page responses. The anonymous response cache accepts a response produced by an attacker-crafted XHR request as a reusable entry, so later cache hits can omit preloaded data. The attack requires anonymous caching to be enabled, and its reported effects are limited to anonymous visitors.

The record

CVE
CVE-2024-55948
Published
Feb 4, 2025
Updated
Feb 4, 2025
Vendor
Discourse
Product
Discourse
Classifications
CWE-346
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 4, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=stable: < 3.3.2
  2. Affected versionversion=tests-passed: < 3.4.0.beta3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Discourse · Discourseversion=stable: < 3.3.2; version=tests-passed: < 3.4.0.beta3

Published CVSS scores

8.2GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-346Origin Validation Error

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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