Critical severity9.8NVD Advisory· Published Apr 27, 2021· Updated Jun 17, 2026
CVE-2021-29476
CVE-2021-29476
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
rmccue/requestsPackagist | >= 1.6.0, < 1.8.0 | 1.8.0 |
Affected products
5- WordPress/Requestsv5Range: >= 1.6.0, < 1.8.0
Patches
Vulnerability mechanics
References
14- github.com/rmccue/Requests/pull/421nvdPatchThird Party AdvisoryWEB
- github.com/WordPress/Requests/security/advisories/GHSA-52qp-jpq7-6c54nvdThird Party AdvisoryWEB
- github.com/advisories/GHSA-52qp-jpq7-6c54ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2021-29476ghsaADVISORY
- 2018.zeronights.ru/wp-content/uploads/materials/9%20ZN2018%20WV%20-%20PHP%20unserialize.pdfghsaWEB
- blog.detectify.com/2019/07/23/improving-wordpress-plugin-securityghsaWEB
- cdn2.hubspot.net/hubfs/3853213/us-18-Thomas-It%27s-A-PHP-Unserialization-Vulnerability-Jim-But-Not-As-We-....pdfghsaWEB
- dannewitz.ninja/posts/php-unserialize-object-injection-yet-another-stars-rating-wordpressghsaWEB
- github.com/FriendsOfPHP/security-advisories/blob/master/rmccue/requests/CVE-2021-29476.yamlghsaWEB
- github.com/WordPress/wordpress-develop/commit/add6bedf3a53b647d0ebda2970057912d3cd79d3ghsaWEB
- github.com/ambionics/phpggc/issues/52ghsaWEB
- i.blackhat.com/us-18/Thu-August-9/us-18-Thomas-Its-A-PHP-Unserialization-Vulnerability-Jim-But-Not-As-We-Know-It.pdfghsaWEB
- medium.com/@knownsec404team/extend-the-attack-surface-of-php-deserialization-vulnerability-via-phar-d6455c6a1066ghsaWEB
- wordpress.org/news/2020/10/wordpress-5-5-2-security-and-maintenance-releaseghsaWEB
News mentions
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