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5.9
MEDIUM CVSS 3.1
CVE-2025-62710
Sakai kernel-impl: predictable PRNG used to generate server‑side encryption key in EncryptionUtilityServiceImpl
Description

Sakai is a Collaboration and Learning Environment. Prior to versions 23.5 and 25.0, EncryptionUtilityServiceImpl initialized an AES256TextEncryptor password (serverSecretKey) using RandomStringUtils with the default java.util.Random. java.util.Random is a non‑cryptographic PRNG and can be predicted from limited state/seed information (e.g., start time window), substantially reducing the effective search space of the generated key. An attacker who can obtain ciphertexts (e.g., exported or at‑rest strings protected by this service) and approximate the PRNG seed can feasibly reconstruct the serverSecretKey and decrypt affected data. SAK-49866 is patched in Sakai 23.5, 25.0, and trunk.

INFO

Published Date :

Oct. 22, 2025, 11:15 p.m.

Last Modified :

Oct. 24, 2025, 7:15 p.m.

Remotely Exploit :

Yes !

Source :

[email protected]
Affected Products

The following products are affected by CVE-2025-62710 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Sakailms sakai
: Total Affected Vendor : 1 | Products : 1
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 LOW [email protected]
CVSS 3.1 MEDIUM [email protected]
Solution
Update Sakai to versions 23.5 or 25.0 or later to fix weak key generation.
  • Update Sakai to version 23.5 or later.
  • Update Sakai to version 25.0 or later.
  • Apply the patch for SAK-49866.
Public PoC/Exploit Available at Github

CVE-2025-62710 has a 1 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2025-62710.

URL Resource
https://github.com/sakaiproject/sakai/commit/bde070104b1de01f4a6458dca6d9e0880a0e3c04
https://github.com/sakaiproject/sakai/security/advisories/GHSA-gr7h-xw4f-wh86
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-62710 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-62710 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Profile Photo
fkie-cad/nvd-json-data-feeds

Community reconstruction of the legacy JSON NVD Data Feeds. This project uses and redistributes data from the NVD API but is neither endorsed nor certified by the NVD.

Shell

Updated: 2 days, 8 hours ago
182 stars 25 fork 25 watcher
Born at : May 17, 2023, 8 a.m. This repo has been linked 10 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2025-62710 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2025-62710 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    Oct. 24, 2025

    Action Type Old Value New Value
    Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
    Removed CVSS V3.1 AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N
  • New CVE Received by [email protected]

    Oct. 22, 2025

    Action Type Old Value New Value
    Added Description Sakai is a Collaboration and Learning Environment. Prior to versions 23.5 and 25.0, EncryptionUtilityServiceImpl initialized an AES256TextEncryptor password (serverSecretKey) using RandomStringUtils with the default java.util.Random. java.util.Random is a non‑cryptographic PRNG and can be predicted from limited state/seed information (e.g., start time window), substantially reducing the effective search space of the generated key. An attacker who can obtain ciphertexts (e.g., exported or at‑rest strings protected by this service) and approximate the PRNG seed can feasibly reconstruct the serverSecretKey and decrypt affected data. SAK-49866 is patched in Sakai 23.5, 25.0, and trunk.
    Added CVSS V3.1 AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N
    Added CWE CWE-337
    Added Reference https://github.com/sakaiproject/sakai/commit/bde070104b1de01f4a6458dca6d9e0880a0e3c04
    Added Reference https://github.com/sakaiproject/sakai/security/advisories/GHSA-gr7h-xw4f-wh86
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 5.9
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact