VulnerabilityPublished 8 Mar 2026Updated 11 Mar 2026

CVE-2026-3733: xuxueli xxl-job · Server-Side Request Forgery

Affects xuxueli xxl-jobSource CVE Database V5

Compare

Public exploit available · CVSS 5.3 Medium.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 4.0 base score

5.3Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.2% chance of exploitation in 30 days – higher than 12% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

Base metrics

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: Low
User Interaction: None
Vulnerable system confidentiality: Low
Vulnerable system integrity: Low
Vulnerable system availability: Low
Subsequent system confidentiality: None
Subsequent system integrity: None
Subsequent system availability: None

Threat metrics

Exploit Maturity: POC

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Attack Requirements: None: The successful attack does not depend on the deployment and execution conditions of the vulnerable system. The attacker can expect to be able to reach the vulnerability and execute the exploit under all or most instances of the vulnerability.
Privileges Required: Low: The attacker requires privileges that provide basic capabilities that are typically limited to settings and resources owned by a single low-privileged user. Alternatively, an attacker with Low privileges has the ability to access only non-sensitive resources.
User Interaction: None: The vulnerable system can be exploited without interaction from any human user, other than the attacker.
Vulnerable system confidentiality: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the Vulnerable System.
Vulnerable system integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact to the Vulnerable System.
Vulnerable system availability: Low: Performance is reduced or there are interruptions in resource availability. Even if repeated exploitation of the vulnerability is possible, the attacker does not have the ability to completely deny service to legitimate users. The resources in the Vulnerable System are either partially available all of the time, or fully available only some of the time, but overall there is no direct, serious consequence to the Vulnerable System.
Subsequent system confidentiality: None: There is no loss of confidentiality within the Subsequent System or all confidentiality impact is constrained to the Vulnerable System.
Subsequent system integrity: None: There is no loss of integrity within the Subsequent System or all integrity impact is constrained to the Vulnerable System.
Subsequent system availability: None: There is no impact to availability within the Subsequent System or all availability impact is constrained to the Vulnerable System.
Exploit Maturity: POC: Based on threat intelligence sources each of the following must apply: · Proof-of-concept is publicly available · No knowledge of reported attempts to exploit this vulnerability · No knowledge of publicly available solutions used to simplify attempts to exploit the vulnerability

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 8 Mar 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: evidence found.
CVSS exploit maturity: proof of concept public
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CVSS vector, the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
xuxuelixxl-job	Affected =3.3.0 =3.3.1 =3.3.2	Fixed in–
Mavencom.xuxueli/xxl-job`pkg:maven/com.xuxueli/xxl-job`Other threats	Affected =3.3.0 =3.3.1 =3.3.2	Fixed in–

CPE configurations (1)

cpe:2.3:a:xuxueli:xxl-job:*:*:*:*:*:*:*:*

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

To mitigate CVE-2026-3733, organizations should immediately enforce strict access token verification for all API endpoints exposed by xxl-job, ensuring that only authenticated and authorized requests are processed. Network segmentation should be applied to limit the server's ability to reach sensitive internal services or external untrusted networks. Implement outbound request filtering and egress controls to restrict the destinations that the xxl-job server can contact. Regularly update to the latest version of xxl-job once patches become available. Conduct thorough input validation and sanitization on parameters that influence outbound requests to prevent injection of malicious URLs. Monitor logs for unusual outbound request patterns indicative of SSRF exploitation attempts. Employ Web Application Firewalls (WAFs) with SSRF detection rules to block suspicious traffic. Finally, perform security audits and penetration testing focused on SSRF vectors in the deployment environment.

Description

A vulnerability was detected in xuxueli xxl-job up to 3.3.2. This impacts an unknown function of the file source-code/src/main/java/com/xxl/job/admin/controller/JobInfoController.java. The manipulation results in server-side request forgery. It is possible to launch the attack remotely. The exploit is now public and may be used. The project maintainer closed the issue report with the following statement: "Access token security verification is required." (translated from Chinese)

Impact

The SSRF vulnerability in xxl-job could allow attackers to perform unauthorized internal network scans, access sensitive internal services, or cause denial of service by triggering unexpected requests. This can lead to exposure of internal infrastructure details, unauthorized data access, or disruption of scheduled job execution. Organizations relying on xxl-job for critical task scheduling may experience operational interruptions or data leakage. The medium CVSS score indicates moderate risk, but the presence of publicly available exploit code increases the likelihood of exploitation attempts. Since the vulnerability requires low privileges but no user interaction, attackers who gain limited access to the system or network could leverage this flaw to escalate their reach internally. The lack of authentication token enforcement significantly raises the risk. Industries with complex internal networks and sensitive data, such as finance, healthcare, and manufacturing, are particularly vulnerable. Additionally, cloud environments using xxl-job could see lateral movement or data exfiltration attempts via SSRF.

Summary

CVE-2026-3733 is a server-side request forgery vulnerability identified in the xuxueli xxl-job open-source distributed task scheduling platform, affecting versions 3.3.0 through 3.3.2. The vulnerability resides in the JobInfoController.java source file, where an attacker can manipulate server-side requests by exploiting insufficient validation or filtering of user-supplied input that controls outbound HTTP requests. This SSRF flaw enables remote attackers to coerce the vulnerable server into sending crafted requests to internal or external systems, potentially bypassing network access controls or firewall rules. The vulnerability can be triggered remotely without user interaction but requires low privileges, indicating that an attacker with limited access could exploit it. The project maintainer has indicated that access token security verification is necessary to prevent exploitation, implying that the vulnerability is mitigated if proper authentication tokens are enforced. The CVSS 4.0 base score of 5.3 reflects a medium severity level, with network attack vector, low attack complexity, no user interaction, and partial impact on confidentiality, integrity, and availability. No public patches or exploits are currently documented, but the exploit code is publicly available, increasing the risk of future attacks. The vulnerability's impact is primarily on the confidentiality and integrity of internal network resources and the availability of services that rely on the xxl-job scheduler.

References

Community reviews

Loading reviews…