Insecure Deserialization of untrusted data in rmccue/requests
Priority MEDIUM 46CWE-502Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-502.
Summary
Requests is a HTTP library written in PHP. Requests mishandles deserialization in FilteredIterator. The issue has been patched and users of `Requests` 1.6.0, 1.6.1 and 1.7.0 should update to version 1.8.0.
Why it matters now
EPSS 0.02142 82nd percentileScored 2026-11-07
Fix Fixed Requests (WordPress): 1.8.0rmccue/requests (Packagist): 1.8.0
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| WordPress | Requests | 1.6.0 to before 1.8.0 | 1.8.0 | Patch available | CNA |
| — | rmccue/requests (Packagist) | 1.6.0 to before 1.8.0 | 1.8.0 | Patch available | GHSA-52qp-jpq7-6c54 |
- Requests VendorWordPress Affected 1.6.0 to before 1.8.0 Fixed in 1.8.0 Patch available CNA
- rmccue/requests (Packagist) Vendor— Affected 1.6.0 to before 1.8.0 Fixed in 1.8.0 Patch available GHSA-52qp-jpq7-6c54
Remediation
- Fix · CNA Requests (WordPress) Fixed in 1.8.0
- Fix · GHSA-52qp-jpq7-6c54 rmccue/requests (Packagist) Fixed in 1.8.0 Advisory →
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2021-29476
- 2026-10-03 Alias added: GHSA-52qp-jpq7-6c54
References
Advisory 2
Other 10
- https://github.com/ambionics/phpggc/issues/52
- https://github.com/WordPress/wordpress-develop/commit/add6bedf3a53b647d0ebda2970057912d3cd79d3
- https://2018.zeronights.ru/wp-content/uploads/materials/9%20ZN2018%20WV%20-%20PHP%20unserialize.pdf
- https://blog.detectify.com/2019/07/23/improving-wordpress-plugin-security
- https://cdn2.hubspot.net/hubfs/3853213/us-18-Thomas-It%27s-A-PHP-Unserialization-Vulnerability-Jim-But-Not-As-We-....pdf
- https://dannewitz.ninja/posts/php-unserialize-object-injection-yet-another-stars-rating-wordpress
- https://github.com/FriendsOfPHP/security-advisories/blob/master/rmccue/requests/CVE-2021-29476.yaml
- https://i.blackhat.com/us-18/Thu-August-9/us-18-Thomas-Its-A-PHP-Unserialization-Vulnerability-Jim-But-Not-As-We-Know-It.pdf
- https://medium.com/@knownsec404team/extend-the-attack-surface-of-php-deserialization-vulnerability-via-phar-d6455c6a1066#3c0f
- https://wordpress.org/news/2020/10/wordpress-5-5-2-security-and-maintenance-release
Sources
- CVE-2021-29476 · CVE Program
- CVE-2021-29476 · NVD
- FIRST EPSS
- GHSA-52qp-jpq7-6c54 · GitHub Advisory Database · CC BY 4.0
- CVE-2021-29476 · Red Hat security data · CC BY 4.0
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