What’s Vulnerable › Vulnerabilities

CVE-2026-73243: kkFileView: Unauthenticated SSRF via /addTask with fullfilename type-confusion bypass

• Severity: medium (CVSS 5.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-11 · updated 2026-10-24
• Weakness: CWE-918

Description

kkFileView is a universal file online preview project based on Spring Boot. Prior to 5.0.1, the unauthenticated GET /addTask endpoint in kkFileView is omitted from TrustHostFilter and TrustDirFilter in server/src/main/java/cn/keking/config/WebConfig.java, allowing FileConvertQueueTask to fetch an attacker-selected URL after FileHandlerService#getFileAttribute uses the fullfilename parameter to force an OFFICE, COMPRESS, or CAD type. This issue is fixed in version 5.0.1.

Affected products

• kekingcn kkFileView: before 5.0.1

References

• https://github.com/kekingcn/kkFileView/commit/32a887aa2cd70228998c617c4e7df6cfcf3fe709
• https://github.com/kekingcn/kkFileView/issues/765
• https://github.com/kekingcn/kkFileView/pull/767
• https://github.com/kekingcn/kkFileView/releases/tag/v5.0.1
• https://github.com/kekingcn/kkFileView/security/advisories/GHSA-gwwj-52hv-6g2m
• https://github.com/kekingcn/kkFileView/security/advisories/GHSA-gwwj-52hv-6g2m

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