CVE-2024-27927 | RSSHub vulnerable to SSRF in /mastodon, /zjoi, and /m4

Exp

RSSHub is an open source RSS feed generator. Prior to version 1.0.0-master.a429472, RSSHub allows remote attackers to use the server as a proxy to send HTTP GET requests to arbitrary targets and retrieve information in the internal network or conduct Denial-of-Service (DoS) attacks. The attacker can send malicious requests to a RSSHub server, to make the server send HTTP GET requests to arbitrary destinations and see partial responses. This may lead to leak the server IP address, which could be hidden behind a CDN; retrieving information in the internal network, e.g. which addresses/ports are accessible, the titles and meta descriptions of HTML pages; and denial of service amplification. The attacker could request the server to download some large files, or chain several SSRF requests in a single attacker request.

Published: 2024-03-21 Last update: 2025-12-04 Assigner: [email protected] Source: [email protected]

Conclusion & alert: CVE-2024-27927 is rated High Exploit Risk (69.4/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.38%). Core evidence: 1 public exploit reference(s) are indexed (Exploit-DB). Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2024-27927

EDB-ID Source Kind Published Link
nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2024-27927

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-03-25 1.05% 1.38% +0.32%
2 2025-12-18 0.78% 1.05% +0.28%
3 2025-12-05 0.78%

Full EPSS history (13 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-27927

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
3.9 2.5 [email protected]

Weakness enumeration for CVE-2024-27927

GitHub Security Advisory for CVE-2024-27927

GHSA-3p3p-cgj7-vgw3 · Severity: medium · Ecosystem: npm — RSSHub vulnerable to Server-Side Request Forgery

Affected software / configurations for CVE-2024-27927

Vendor Product Version Raw CPE
rsshub rsshub < 1.0.0-master.a429472 cpe:2.3:a:rsshub:rsshub:*:*:*:*:*:node.js:*:*

References for CVE-2024-27927

cvelogic Threat Intelligence