CVE-2025-66027 Vulnerability Analysis & Exploit Details

CVE-2025-66027
Vulnerability Scoring

6.5
/10
High Risk

If left unpatched, CVE-2025-66027 could lead to major system disruptions or data loss.

Attack Complexity Details

  • Attack Complexity: Low
    Exploits can be performed without significant complexity or special conditions.
  • Attack Vector: Network
    Vulnerability is exploitable over a network without physical access.
  • Privileges Required: Low
    Some privileges are necessary to exploit the vulnerability.
  • Scope: Unchanged
    Exploit remains within the originally vulnerable component.
  • User Interaction: None
    No user interaction is necessary for exploitation.

CVE-2025-66027 Details

Status: Analyzed

Last updated: 🕗 03 Dec 2025, 20:25 UTC
Originally published on: 🕐 29 Nov 2025, 01:16 UTC

Time between publication and last update: 4 days

CVSS Release: version 3

CVSS3 Source

nvd@nist.gov

CVSS3 Type

Primary

CVSS3 Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVE-2025-66027 Vulnerability Summary

CVE-2025-66027: Rallly is an open-source scheduling and collaboration tool. Prior to version 4.5.6, an information disclosure vulnerability exposes participant details, including names and email addresses through the /api/trpc/polls.get,polls.participants.list endpoint, even when Pro privacy features are enabled. This bypasses intended privacy controls that should prevent participants from viewing other users’ personal information. This issue has been patched in version 4.5.6.

Assessing the Risk of CVE-2025-66027

Access Complexity Graph

The exploitability of CVE-2025-66027 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).

Exploitability Analysis for CVE-2025-66027

CVE-2025-66027 presents an accessible attack vector with minimal effort required. Restricting access controls and implementing security updates are critical to reducing exploitation risks.

Understanding AC and PR

A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.

Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.

Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.

CVSS Score Breakdown Chart

Above is the CVSS Sub-score Breakdown for CVE-2025-66027, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.

CIA Impact Analysis

Below is the Impact Analysis for CVE-2025-66027, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: High
    Exploiting CVE-2025-66027 can result in unauthorized access to sensitive data, severely compromising data privacy.
  • Integrity: None
    CVE-2025-66027 poses no threat to data integrity.
  • Availability: None
    CVE-2025-66027 does not impact system availability.

CVE-2025-66027 References

External References

CWE Common Weakness Enumeration

CWE-359

CAPEC Common Attack Pattern Enumeration and Classification

  • Evercookie CAPEC-464 An attacker creates a very persistent cookie that stays present even after the user thinks it has been removed. The cookie is stored on the victim's machine in over ten places. When the victim clears the cookie cache via traditional means inside the browser, that operation removes the cookie from certain places but not others. The malicious code then replicates the cookie from all of the places where it was not deleted to all of the possible storage locations once again. So the victim again has the cookie in all of the original storage locations. In other words, failure to delete the cookie in even one location will result in the cookie's resurrection everywhere. The evercookie will also persist across different browsers because certain stores (e.g., Local Shared Objects) are shared between different browsers.
  • Cross Site Identification CAPEC-467 An attacker harvests identifying information about a victim via an active session that the victim's browser has with a social networking site. A victim may have the social networking site open in one tab or perhaps is simply using the "remember me" feature to keep their session with the social networking site active. An attacker induces a payload to execute in the victim's browser that transparently to the victim initiates a request to the social networking site (e.g., via available social network site APIs) to retrieve identifying information about a victim. While some of this information may be public, the attacker is able to harvest this information in context and may use it for further attacks on the user (e.g., spear phishing).
  • Probe iOS Screenshots CAPEC-498 An adversary examines screenshot images created by iOS in an attempt to obtain sensitive information. This attack targets temporary screenshots created by the underlying OS while the application remains open in the background.
  • Shoulder Surfing CAPEC-508 In a shoulder surfing attack, an adversary observes an unaware individual's keystrokes, screen content, or conversations with the goal of obtaining sensitive information. One motive for this attack is to obtain sensitive information about the target for financial, personal, political, or other gains. From an insider threat perspective, an additional motive could be to obtain system/application credentials or cryptographic keys. Shoulder surfing attacks are accomplished by observing the content "over the victim's shoulder", as implied by the name of this attack.

Vulnerable Configurations

  • cpe:2.3:a:rallly:rallly:2.0.0:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:2.0.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:2.1.0:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:2.1.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:2.1.1:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:2.1.1:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:2.2.0:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:2.2.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:2.2.1:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:2.2.1:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:2.2.2:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:2.2.2:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:2.2.3:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:2.2.3:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:2.3.0:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:2.3.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:2.3.1:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:2.3.1:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:2.4.0:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:2.4.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:2.4.1:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:2.4.1:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:2.5.0:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:2.5.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:2.5.1:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:2.5.1:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:2.6.0:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:2.6.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:2.7.0:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:2.7.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:2.7.1:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:2.7.1:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:2.8.0:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:2.8.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:2.8.1:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:2.8.1:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:2.8.2:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:2.8.2:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:2.8.3:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:2.8.3:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:2.9.0:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:2.9.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:2.9.1:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:2.9.1:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:2.9.2:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:2.9.2:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:2.10.0:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:2.10.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:2.11.0:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:2.11.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:2.11.1:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:2.11.1:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:3.0.0:-:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:3.0.0:-:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:3.0.0:rc1:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:3.0.0:rc1:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:3.0.1:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:3.0.1:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:3.1.0:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:3.1.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:3.1.1:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:3.1.1:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:3.2.0:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:3.2.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:3.2.1:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:3.2.1:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:3.3.0:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:3.3.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:3.4.0:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:3.4.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:3.4.1:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:3.4.1:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:3.4.2:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:3.4.2:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:3.5.0:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:3.5.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:3.5.1:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:3.5.1:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:3.6.0:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:3.6.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:3.6.1:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:3.6.1:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:3.7.0:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:3.7.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:3.8.0:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:3.8.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:3.8.1:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:3.8.1:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:3.9.0:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:3.9.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:3.9.1:-:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:3.9.1:-:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:3.9.1:fork1:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:3.9.1:fork1:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:3.9.1:fork2:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:3.9.1:fork2:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:3.9.1:fork3:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:3.9.1:fork3:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:3.9.1:fork4:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:3.9.1:fork4:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:3.9.1:fork5:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:3.9.1:fork5:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:3.9.1:fork6:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:3.9.1:fork6:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:3.10.0:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:3.10.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:3.10.1:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:3.10.1:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:3.11.0:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:3.11.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:3.11.1:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:3.11.1:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:3.11.2:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:3.11.2:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:4.0.0:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:4.0.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:4.0.1:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:4.0.1:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:4.0.2:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:4.0.2:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:4.1.0:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:4.1.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:4.1.1:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:4.1.1:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:4.1.2:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:4.1.2:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:4.2.0:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:4.2.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:4.3.0:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:4.3.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:4.3.1:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:4.3.1:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:4.4.0:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:4.4.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:4.4.1:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:4.4.1:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:4.5.0:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:4.5.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:4.5.1:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:4.5.1:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:4.5.2:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:4.5.2:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:4.5.3:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:4.5.3:*:*:*:*:*:*:*
  • cpe:2.3:a:rallly:rallly:4.5.4:*:*:*:*:*:*:*
    cpe:2.3:a:rallly:rallly:4.5.4:*:*:*:*:*:*:*

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