Vulnerability database
Every flaw the U.S. government’s cybersecurity agency (CISA) has confirmed attackers are using, plus the new WordPress plugin and theme bugs published each day, sorted by what they mean for a small business. We refresh it twice a day. If you see something your website or office runs, tell us.
4 results
Aug 31, 2026PaperCut NG/MF Missing Authentication for Critical Function VulnerabilityCVE-2026-81578 · Other software · PaperCut · reported by eb41dac7-0af8-4f84-9f6d-0272772514f4ExploitedHigh 8.8
PaperCut NG/MF contains a missing authentication for critical function vulnerability which allows an unauthenticated remote attacker to modify certain system configurations. This vulnerability can be chained with CVE-2026-82078.
- Product
- NG/MF
- On CISA’s list since
- Aug 31, 2026 (federal fix deadline Sep 14, 2026)
- What to do
- Attackers are using this now. Install PaperCut’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD recordCISA catalogpapercut.comgithub.com
Aug 31, 2026PaperCut NG/MF Unsafe Reflection VulnerabilityCVE-2026-82078 · Other software · PaperCut · reported by eb41dac7-0af8-4f84-9f6d-0272772514f4ExploitedCritical 9.4
PaperCut NG/MF contains an unsafe reflection vulnerability that allows an attacker to manipulate system configuration parameters and execute arbitrary Java bytecode residing on the application classpath under the security context of the PaperCut server process. This vulnerability can be chained with CVE-2026-81578.
- Product
- NG/MF
- On CISA’s list since
- Aug 31, 2026 (federal fix deadline Sep 14, 2026)
- What to do
- Attackers are using this now. Install PaperCut’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD recordCISA catalogpapercut.comgithub.com
Apr 20, 2026PaperCut NG/MF Improper Authentication VulnerabilityCVE-2023-27351 · Other software · PaperCut · reported by zdi-disclosures@trendmicro.comExploitedRansomwareHigh 7.5
PaperCut NG/MF contains an improper authentication vulnerability that could allow remote attackers to bypass authentication on affected installations via the SecurityRequestFilter class.
- Product
- NG/MF
- On CISA’s list since
- Apr 20, 2026 (federal fix deadline May 4, 2026)
- What to do
- Attackers are using this now. Install PaperCut’s update today (ransomware groups use this one). If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD recordCISA catalogpapercut.comzerodayinitiative.com
Jul 28, 2025PaperCut NG/MF Cross-Site Request Forgery (CSRF) VulnerabilityCVE-2023-2533 · Other software · PaperCut · reported by help@fluidattacks.comExploitedHigh 8.4
PaperCut NG/MF contains a cross-site request forgery (CSRF) vulnerability, which, under specific conditions, could potentially enable an attacker to alter security settings or execute arbitrary code.
- Product
- NG/MF
- On CISA’s list since
- Jul 28, 2025 (federal fix deadline Aug 18, 2025)
- What to do
- Attackers are using this now. Install PaperCut’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD recordCISA catalogfluidattacks.compapercut.com
Where this comes from: the exploited list is CISA’s Known Exploited Vulnerabilities catalog. Everything else is the whole National Vulnerability Database, where each record is published by the team that found the bug (Wordfence, Patchstack, WPScan, the vendors themselves and others); we show who. Exploit odds are FIRST’s EPSS, updated daily. Titles and categories are ours, so check the linked record before acting on a detail. For a write-up of the big ones, see our advisories. Every vendor, and every WordPress plugin and theme with a recorded flaw, also has its own page. All of it is free to reuse as JSON, CSV or RSS.
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