CVE-2020-7062
Null Pointer Dereference in PHP Session Upload Progress
- Published
- Updated
- Reserved
- Assigned by
- php
Description
In PHP versions 7.2.x below 7.2.28, 7.3.x below 7.3.15 and 7.4.x below 7.4.3, when using file upload functionality, if upload progress tracking is enabled, but session.upload_progress.cleanup is set to 0 (disabled), and the file upload fails, the upload procedure would try to clean up data that does not exist and encounter null pointer dereference, which would likely lead to a crash.
Timeline
ID reserved
By php
- 43 days later
· 43 days later
Published
- 5 years later
· 5 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| phpCNA (assigner) | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 3.6% · top 11% of all CVEs (7 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Weakness
Affected products
What to do
Workaround: Disable file uploading, file upload tracking or enable session.upload_progress.cleanup.
References (8)
- https://bugs.php.net/bug.php?id=79221 (opens in a new tab)x_refsource_MISCx_transferred
- openSUSE-SU-2020:0341 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- GLSA-202003-57 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- [debian-lts-announce] 20200326 [SECURITY] [DLA 2160-1] php5 security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- USN-4330-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- DSA-4717 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- DSA-4719 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- https://www.tenable.com/security/tns-2021-14 (opens in a new tab)x_refsource_CONFIRMx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2020-7062)Record last updated .