PatchTheCVECVE-2020-29312: An issue found in Zend Framework v.3.1.3 and before allow a remote attacker to execute arbitrary code via the
CVE-2020-29312 is a critical-severity flaw (CVSS 9.8) affecting zend framework. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
An issue found in Zend Framework v.3.1.3 and before allow a remote attacker to execute arbitrary code via the unserialize function. Note: This has been disputed by third parties as incomplete and incorrect. The framework does not have a version that surpasses 2.x.x and was deprecated in early 2020.
Why this priority
- Critical severity
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 9.8 (Critical) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 1.3% (top 31%) |
| CISA exploited list | No |
| Weakness | CWE-502 |
| Published | 2023-04-04 |
| Last modified | 2026-07-09 |
Last updated 2026-07-09 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2020-29312?
zend framework: upgrade to newer than 3.1.3. Exact commands for each OS are on this page.
Is CVE-2020-29312 being exploited?
CVE-2020-29312 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2020-29312 affect?
CVE-2020-29312 affects zend framework. Severity is critical (CVSS 9.8). An issue found in Zend Framework v.3.1.3 and before allow a remote attacker to execute arbitrary code via the unserialize function. Note: This has been disputed by third parties as incomplete and incorrect. The framework does not have a ver
How urgent is CVE-2020-29312?
Priority 57/100. Critical severity; Remotely exploitable, no login, no user action
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