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Rebuild CVE-2024-1021

CRITICAL
Server-Side Request Forgery (SSRF) (CWE-918)
2024-01-29 cna@vuldb.com
9.8
CVSS 3.1 · NVD
View

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V4 - API and Web Service URL allowlisting, SSRF prevention
MITRE ATT&CK

2 techniques across 2 tactics: Initial Access, Credential Access

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Impact

CVSS score of 9.8 (CRITICAL). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. Public proof-of-concept exploit code is available.

Exploit ScenarioDerived

A remote attacker could make the server perform requests to unintended internal or external resources by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability.

Act Now Prioritize within 24-48h. Why: CRITICAL + EPSS > 30%, no patch available.
No patch listed yet 34.7% exploitation probability (EPSS)

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AnalysisAI

A vulnerability, which was classified as critical, has been found in Rebuild up to 3.5.5. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate and allowlist destination URLs, block requests to internal networks, use network segmentation.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified as Server-Side Request Forgery (SSRF) (CWE-918), which allows attackers to make the server perform requests to unintended internal or external resources. A vulnerability, which was classified as critical, has been found in Rebuild up to 3.5.5. Affected by this issue is the function readRawText of the component HTTP Request Handler. The manipulation of the argument url leads to server-side request forgery. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. VDB-252290 is the identifier assigned to this vulnerability. Affected products include: Ruifang-Tech Rebuild. Version information: up to 3.5.5..

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

DescriptionNVD

A vulnerability, which was classified as critical, has been found in Rebuild up to 3.5.5. Affected by this issue is the function readRawText of the component HTTP Request Handler. The manipulation of the argument url leads to server-side request forgery. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. VDB-252290 is the identifier assigned to this vulnerability.

Threat Intelligence Overview

EPSS Score
34.7%
Top 2% exploitable
Exploit
POC
Public exploit code exists
Data Quality
3 sources
Confidence: Low

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity CRITICAL
CISA KEV No
Public POC Yes
EPSS 34.7%
Patch available No
Active threat Yes
Deciding rule
CRITICAL + EPSS > 30%, no patch available
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
Poc
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact· derived
Medium

Priority Score

104
Low Medium High Critical
KEV: 0
EPSS: +35
CVSS: +49
PoC: +20
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Server-Side Request Forgery exploits applications that fetch remote resources based on user-supplied URLs.

Affected Products (CPE)NVD

cpe:2.3:a:ruifang-tech:rebuild:*:*:*:*:*:*:*:*
CVE-2023-1612 CRITICAL POC
9.8 Mar 23

A vulnerability, which was classified as critical, was found in Rebuild up to 3.2.3. Rated critical severity (CVSS 9.8),

CVE-2023-1610 CRITICAL POC
9.8 Mar 23

A vulnerability, which was classified as critical, has been found in Rebuild up to 3.2.3. Rated critical severity (CVSS

CVE-2023-1495 HIGH POC
8.8 Mar 19

A vulnerability classified as critical was found in Rebuild up to 3.2.3. Rated high severity (CVSS 8.8), this vulnerabil

CVE-2024-1098 HIGH POC
7.5 Jan 31

A vulnerability was found in Rebuild up to 3.5.5 and classified as problematic.getStorageFile of the file /filex/proxy-d

CVE-2022-30049 HIGH POC
7.5 May 15

A Server-Side Request Forgery (SSRF) in Rebuild v2.8.3 allows attackers to obtain the real IP address and scan Intranet

CVE-2024-1020 MEDIUM POC
6.1 Jan 29

A vulnerability classified as problematic was found in Rebuild up to 3.5.5. Rated medium severity (CVSS 6.1), this vulne

CVE-2026-102248 MEDIUM POC
5.5 Sep 29

Rebuild instances up to and including 4.4.7 and 4.5.0-beta5 expose a login endpoint (/user/login) that fails to properly

CVE-2026-102249 MEDIUM POC
5.5 Sep 29

Missing authorization in REBUILD up to 4.4.11 allows unauthenticated remote attackers to manipulate the url or fileKey p

CVE-2024-1099 MEDIUM POC
5.4 Jan 31

A vulnerability was found in Rebuild up to 3.5.5. Rated medium severity (CVSS 5.4), this vulnerability is remotely explo

CVE-2024-12665 MEDIUM POC
5.3 Dec 16

A vulnerability, which was classified as problematic, was found in ruifang-tech Rebuild 3.8.5. Rated medium severity (CV

CVE-2024-12664 MEDIUM POC
5.3 Dec 16

A vulnerability, which was classified as problematic, has been found in ruifang-tech Rebuild 3.8.5. Rated medium severit

CVE-2024-25294 CRITICAL
9.1 Mar 20

An SSRF issue in REBUILD v.3.5 allows a remote attacker to obtain sensitive information and execute arbitrary code via t

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