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)
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.823 (99.7th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 100th percentile — 99.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.823 · newest: 0.823 · change: 0.000
Affected products
- Smarty
- Debian Linux — versions 9.0, 10.0, 11.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/smarty-php/smarty/blob/master/CHANGELOG.md (Third Party Advisory, Release Notes)
- lists.debian.org/debian-lts-announce/2021/04/msg00004.html (mailing-list, Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2021/04/msg00014.html (mailing-list, Mailing List, Third Party Advisory)
- security.gentoo.org/glsa/202105-06 (vendor-advisory, Patch, Third Party Advisory)
- www.debian.org/security/2022/dsa-5151 (vendor-advisory, Third Party Advisory)
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.