RCE in Smarty
CVE-2021-26120
Smarty before 3.1.39 allows code injection via an unexpected function name after a {function name= substring.
Vulnerability class: RCE (Remote Code Execution)
EPSS: 0.823 (99.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Smarty
- Debian Debian_linux — versions 9.0, 10.0, 11.0
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Third Party Advisory, x_refsource_MISC, Release Notes)
- cve@mitre.org (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
- cve@mitre.org (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
- cve@mitre.org (vendor-advisory, Patch, Third Party Advisory, x_refsource_GENTOO)
- cve@mitre.org (vendor-advisory, Third Party Advisory, x_refsource_DEBIAN)
Frequently asked questions
- What is CVE-2021-26120?
- CVE-2021-26120 is a critical-severity vulnerability in Smarty, classified under Code Injection. CVSS score: 9.8/10. Published 2021-02-22.
- How severe is CVE-2021-26120?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2021-26120 known to be exploited?
- 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.