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CVE-2023-27351 is an improper authentication vulnerability in PaperCut NG/MF's SecurityRequestFilter class. An incorrectly implemented authentication algorithm allows remote attackers without credentials to bypass authentication and potentially retrieve user information. PaperCut NG 22.0.5 (Build 63914) is explicitly identified as affected. Exposed information can include usernames, full names, email addresses, office or department details, and assigned proximity card numbers. The vulnerability was exploited in 2023 campaigns alongside CVE-2023-27350.
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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.
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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.
51 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A historical PaperCut vulnerability cited as an example of previous in-the-wild exploitation. The content does not explain its mechanism or identify attackers, malware, affected versions, or remediation.
An earlier PaperCut vulnerability referenced as having been linked to LockBit ransomware operations.
A high-severity PaperCut information-disclosure vulnerability exploited with CVE-2023-27350 in 2023 attacks.
A high-severity PaperCut information-disclosure vulnerability that was chained with CVE-2023-27350 in 2023 attacks.
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.