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No exploitation reportedFix available

CVE-2023-28115

No exploitation reported by the sources we read.

  • Published2023-03-17
  • Fixed in1.4.2
  • WeaknessCWE-502

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Snappy is a PHP library allowing thumbnail, snapshot or PDF generation from a url or a html page. Prior to version 1.4.2, Snappy is vulnerable to PHAR deserialization due to a lack of checking on the protocol before passing it into the `file_exists()` function. If an attacker can upload files of any type to the server he can pass in the phar:// protocol to unserialize the uploaded file and instantiate arbitrary PHP objects. This can lead to remote code execution especially when snappy is used with frameworks with documented POP chains like Laravel/Symfony vulnerable developer code. If a user can control the output file from the `generateFromHtml()` function, it will invoke deserialization. This vulnerability is capable of remote code execution if Snappy is used with frameworks or developer code with vulnerable POP chains. It has been fixed in version 1.4.2.

Timeline

dates in UTC
  1. 2023-03-1722:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-11-03 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-28115?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-28115?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV
Knplabs snappy
BranchAffectedFixed in
1.4< 1.4.21.4.2

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As GitHub_M, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • KnpLabs snappy
    Affected
    • = < 1.4.2no fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2023-03-17

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • civicrmUbuntu:Pro:22.04:LTSall versions · no fixed version listed
  • civicrmUbuntu:Pro:20.04:LTSall versions · no fixed version listed
  • civicrmUbuntu:Pro:18.04:LTSall versions · no fixed version listed
  • civicrmUbuntu:Pro:16.04:LTSall versions · no fixed version listed
  • civicrmDebian:11all versions · no fixed version listed
  • snappyWolfiall versions · fixed in 0
  • snappyChainguardall versions · fixed in 0

Full record on NVD

Fix

  1. Update Knplabs snappy to 1.4.2

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

Sources

  • CISA-ADPSSVC decisionnone2025-02-25
  • OpenCVESSVC decisionnone—
  • CNACVSS 3.19.8known since 2026-10-23
  • NVDCVSS 3.19.8read 2026-10-23
  • CNAweakness (CWE)CWE-502known since 2026-10-23
  • FIRST EPSSEPSS score2.8 %2026-11-03
  • OSVaffected packages—
  • GitHub AdvisoriesadvisoryCRITICAL2023-03-17

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2023-03-17
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-gq6w-q6wh-jggc

Frequently asked questions

What is CVE-2023-28115?

Snappy is a PHP library allowing thumbnail, snapshot or PDF generation from a url or a html page. Prior to version 1.4.2, Snappy is vulnerable to PHAR deserialization due to a lack of checking on the protocol before passing it into the `file_exists()` function. If an attacker can upload files of any type to the server he can pass in the phar:// protocol to unserialize the uploaded file and instantiate arbitrary PHP objects. This can lead to remote code execution especially when snappy is used with frameworks with documented POP chains like Laravel/Symfony vulnerable developer code. If a user can control the output file from the `generateFromHtml()` function, it will invoke deserialization. This vulnerability is capable of remote code execution if Snappy is used with frameworks or developer code with vulnerable POP chains. It has been fixed in version 1.4.2.

Is CVE-2023-28115 actively exploited?

Active exploitation of CVE-2023-28115 has not been confirmed. Its EPSS score was 2.8% on 2026-11-03, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-28115?

CVE-2023-28115 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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