RCE in Smarty
CVE-2022-29221
Smarty is a template engine for PHP, facilitating the separation of presentation (HTML/CSS) from application logic. Prior to versions 3.1.45 and 4.1.1, template authors could inject php code by choosing a malicious {block} name or {include} file name. Sites that cannot fully trust template authors should upgrade to versions 3.1.45 or 4.1.1 to receive a patch for this issue. There are currently no known workarounds.
Vulnerability class: RCE (Remote Code Execution)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.049 (92.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 92.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.049 · newest: 0.049 · change: 0.000
Affected products
- Smarty
- Smarty-Php Smarty — versions < 3.1.45, >= 4.0.0, < 4.1.1
- Debian Linux — versions 9.0, 10.0, 11.0
- Fedoraproject Fedora — versions 36, 37
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/smarty-php/smarty/security/advisories/GHSA-634x-pc3q-cf4c (Third Party Advisory)
- github.com/smarty-php/smarty/commit/64ad6442ca1da31cefdab5c9874262b702cccddd (Patch, Third Party Advisory)
- github.com/smarty-php/smarty/releases/tag/v3.1.45 (Third Party Advisory, Release Notes)
- github.com/smarty-php/smarty/releases/tag/v4.1.1 (Third Party Advisory, Release Notes)
- lists.debian.org/debian-lts-announce/2022/05/msg00044.html (mailing-list, Mailing List, Third Party Advisory)
- www.debian.org/security/2022/dsa-5151 (vendor-advisory, Third Party Advisory)
- security.gentoo.org/glsa/202209-09 (vendor-advisory, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
Frequently asked questions
- What is CVE-2022-29221?
- CVE-2022-29221 is a high-severity vulnerability in Smarty, classified under Code Injection. CVSS score: 8.8/10. Published 2022-05-24.
- How severe is CVE-2022-29221?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2022-29221 known to be exploited?
- 12 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.