{"cve":"CVE-1999-1053","nvd":{"published":"1999-09-13T04:00:00.000","modified":"2026-06-16T21:49:36.507","status":"Modified","description":"guestbook.pl cleanses user-inserted SSI commands by removing text between \"<!--\" and \"-->\" separators, which allows remote attackers to execute arbitrary commands when guestbook.pl is run on Apache 1.3.9 and possibly other versions, since Apache allows other closing sequences besides \"-->\".","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["http://www.securityfocus.com/archive/1/33674","http://www.securityfocus.com/archive/82/27296","http://www.securityfocus.com/archive/82/27560","http://www.securityfocus.com/bid/776","http://www.securityfocus.com/archive/1/33674"],"products":["apache:http_server","matt_wright:matt_wright_guestbook"],"source":"nvd","synced_at":"2026-10-19T19:33:01.030757803+00:00"},"epss":{"cve":"CVE-1999-1053","score":0.85205,"percentile":0.99715,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}