# CVE-2025-45769: php-jwt contains weak encryption

Source: https://junglewise.ai/threats/cve-2025-45769-php-jwt-contains-weak-encryption  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-07-31  
License: CC BY 4.0 with a link back

CVE-2025-45769 · Severity: low · CVSS 3.1 · Published 2025-07-31

php-jwt contains weak encryption

Technologies: [firebase/php-jwt (Packagist)](https://junglewise.ai/threats/technologies/firebase-php-jwt). Vendors: [Packagist](https://junglewise.ai/threats/vendors/packagist).

## Quick answers

**Is CVE-2025-45769 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-45769 being exploited in the wild.

**How severe is CVE-2025-45769?** Low severity, with a CVSS score of 3.1, published 31 July 2025.

**Which products and versions are affected?** firebase/php-jwt (Packagist) ECOSYSTEM:introduced=0,fixed=7.0.0.

**Is there a fix for CVE-2025-45769?** Yes. firebase/php-jwt (Packagist): upgrade to 7.0.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2025-45769?** Check whether you run firebase/php-jwt (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- firebase/php-jwt (Packagist): upgrade to 7.0.0 or later

  ```sh
  composer require firebase/php-jwt:^7.0.0
  ```


## Affected products

- firebase/php-jwt (Packagist) ECOSYSTEM:introduced=0,fixed=7.0.0

## Identifiers

- CVE-2025-45769
- GHSA-2x45-7fc3-mxwq

## Related threats

- [firebase/php-jwt: "None" Algorithm treated as valid on tokens](https://junglewise.ai/threats/firebase-php-jwt-none-algorithm-treated-as-valid-on-tokens-5fd83183)
- [Firebase PHP-JWT key/algorithm type confusion](https://junglewise.ai/threats/cve-2021-46743-firebase-php-jwt-key-algorithm-type-confusion)