CVE-2025-6701VulnerabilityPublished 26 Jun 2025

CVE-2025-6701: Xuxueli xxl-sso · Open Redirect

Affects Xuxueli xxl-ssoSource CVE Database V5

Not known to be exploited · CVSS 5.1 Medium.

Data as of 26 Oct 2026, 06:26 UTC

CVSS 4.0 base score

5.1Medium

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

EPSS: 0.3% chance of exploitation in 30 days – higher than 24% 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:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P

Base metrics

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: Low
User Interaction: Passive
Vulnerable system confidentiality: None
Vulnerable system integrity: Low
Vulnerable system availability: None
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: Passive: Successful exploitation of this vulnerability requires limited interaction by the targeted user with the vulnerable system and the attacker’s payload. These interactions would be considered involuntary and do not require that the user actively subvert protections built into the vulnerable system.
Vulnerable system confidentiality: None: There is no loss of confidentiality within 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: None: There is no impact to availability within 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 26 Jun 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
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), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-26.

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.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC 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
Mavencom.xuxueli/xxl-sso`pkg:maven/com.xuxueli/xxl-sso`Other threats	Affected =1.1.0	Fixed in–

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

AI-suggested

1. Immediate mitigation should include implementing strict input validation and sanitization on the 'redirect_url' parameter to ensure only safe, internal URLs are accepted. This can be done by enforcing allowlists of valid redirect destinations or using relative paths rather than full URLs. 2. If modifying the application code is not immediately feasible, deploy web application firewall (WAF) rules to detect and block requests with suspicious or external redirect_url parameters. 3. Educate users and administrators about the risk of phishing attacks exploiting this vulnerability, emphasizing caution with unexpected login redirects. 4. Monitor authentication logs for unusual redirect patterns or spikes in failed login attempts that may indicate exploitation attempts. 5. Consider temporarily disabling or restricting the use of the vulnerable endpoint if possible until a vendor patch or official fix is available. 6. Engage with the vendor or community to seek updates or patches and track any future advisories. 7. For long-term mitigation, upgrade to a patched version once available or consider alternative SSO solutions with robust security track records. 8. Implement multi-factor authentication (MFA) to reduce the impact of credential theft stemming from phishing enabled by this vulnerability.

Description

A vulnerability, which was classified as problematic, has been found in Xuxueli xxl-sso 1.1.0. This issue affects some unknown processing of the file /xxl-sso-server/doLogin. The manipulation of the argument redirect_url leads to open redirect. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Impact

For European organizations, the open redirect vulnerability in xxl-sso 1.1.0 poses a moderate risk primarily through social engineering and phishing campaigns leveraging trusted internal authentication portals. Since SSO systems are central to user authentication across multiple services, successful exploitation could erode user confidence and potentially serve as a stepping stone for more sophisticated attacks such as credential harvesting or session hijacking. Organizations relying on xxl-sso 1.1.0 for authentication may face increased phishing risks, potentially leading to unauthorized access if users are tricked into visiting malicious sites via manipulated redirects. The vulnerability does not directly compromise system confidentiality or availability but can indirectly facilitate data breaches or malware infections. Given the public disclosure and lack of vendor mitigation, European entities using this software should consider the threat significant enough to warrant immediate attention, especially in sectors with high-value targets such as finance, government, and critical infrastructure. The medium severity rating suggests that while the vulnerability is not critical, it should not be ignored due to the potential for exploitation in targeted phishing campaigns.

Summary

CVE-2025-6701 is an open redirect vulnerability identified in version 1.1.0 of the Xuxueli xxl-sso product, a single sign-on (SSO) solution. The vulnerability arises from improper validation or sanitization of the 'redirect_url' parameter in the /xxl-sso-server/doLogin endpoint. An attacker can manipulate this parameter to redirect users to arbitrary external URLs after login attempts. This flaw is exploitable remotely without requiring authentication, although user interaction is necessary since the victim must click a crafted link or be redirected through social engineering or phishing tactics. The CVSS 4.0 base score is 5.1 (medium severity), reflecting network attack vector, low attack complexity, no privileges required, but user interaction needed, and limited impact on confidentiality and integrity. Open redirect vulnerabilities primarily facilitate phishing, credential theft, or malware distribution by abusing trusted domains to lure victims. While the direct impact on system integrity or availability is low, the risk lies in enabling social engineering attacks that can lead to further compromise. Since xxl-sso is an SSO system, exploitation could undermine user trust and potentially facilitate session hijacking or credential interception if combined with other vulnerabilities or attacks. The lack of vendor response and absence of patches increases the window of exposure for organizations using this version. The vulnerability affects only version 1.1.0, and no information about other versions is provided.

References

Community reviews

Loading reviews…

Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 26 Jun 2025, 16:21 UTC

Technical details

References

Community reviews

Related threats