CVE-2023-1496
Published: 19 March 2023
Summary
CVE-2023-1496 is a medium-severity Cross-site Scripting (CWE-79) vulnerability in Evilmartians Imgproxy. Its CVSS base score is 5.4 (Medium).
Operationally, ranked in the top 2.6% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
CVE-2023-1496 is a reflected cross-site scripting vulnerability affecting the imgproxy image proxy server in versions prior to 3.14.0. The flaw, tracked under CWE-79, resides in the handling of user-supplied input that is reflected back in responses without adequate sanitization, enabling script injection when the application is accessed over the network.
An authenticated attacker with low privileges can craft a malicious request that, when clicked by another user, executes arbitrary JavaScript in the victim's browser context. Successful exploitation yields limited impacts consisting of unauthorized disclosure or modification of data within the affected origin, as reflected in the CVSS 5.4 scoring that requires user interaction and produces a changed scope.
The referenced GitHub commit 62f8d08a93d301285dcd1dabcc7ba10c6c65b689 implements the fix and is included in the 3.14.0 release; organizations should upgrade imgproxy to this version or later. The associated EPSS score has remained at its observed peak of 0.3977 with no material upward trajectory after disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-0983
Vulnerability details
Cross-site Scripting (XSS) - Reflected in GitHub repository imgproxy/imgproxy prior to 3.14.0.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Penetration testing submits XSS payloads to web applications, detecting cross-site scripting flaws for subsequent remediation.
Validates web inputs to reject script-related content that could produce XSS.
Output validation against expected content can reject or sanitize script content in generated web pages, reducing XSS exploitability.