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CVE-2020-13973 is a cross-site scripting vulnerability in OWASP json-sanitizer versions prior to 1.2.1. The issue arises when sanitized JSON output is embedded as JavaScript inside an HTML SCRIPT element. If an attacker can control a substring of the input JSON and also control another substring adjacent to the surrounding SCRIPT element, they may be able to confuse the HTML parser about where the SCRIPT element terminates. This can cause content that should be treated as non-script data to instead be interpreted and executed as JavaScript in the victim's browser.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
2 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
No news coverage yet. Advisories and community discussion only.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.