CVE-2024-23692
CVE-2024-23692 is a security flaw in Rejetto HTTP File Server. Attackers can run commands on Rejetto HTTP File Server from anywhere, without logging in. The US Cybersecurity and Infrastructure Security Agency (CISA) added it to its catalog of flaws known to be used in attacks on 9 Jul 2024, and says ransomware gangs have used it.[1]
Rejetto HTTP File Server is business software or equipment. Most families won’t have it, but attackers break into it to get inside companies, and from there to what those companies hold about their customers, patients and staff. Rejetto has published a fix or advice.
Description
CISA calls it an improper neutralization of special elements used in a template engine in Rejetto HTTP File Server. In its words: “Rejetto HTTP File Server contains an improper neutralization of special elements used in a template engine vulnerability. This allows a remote, unauthenticated attacker to execute commands on the affected system by sending a specially crafted HTTP request.”[1]
The CVE record adds: “Rejetto HTTP File Server, up to and including version 2.3m, is vulnerable to a template injection vulnerability. This vulnerability allows a remote, unauthenticated attacker to execute arbitrary commands on the affected system by sending a specially crafted HTTP request. As of the CVE assignment date, Rejetto HFS 2.3m is no longer supported.”[2]
The underlying weakness is CWE-1336, in MITRE’s list of common software weaknesses.
It scores 9.8 out of 10 on the Common Vulnerability Scoring System, which rates it critical, scored by NVD using CVSS 3.1.[2]
Affected versions
NVD’s record doesn’t list version ranges for it; Rejetto’s advisory has them[3]. CISA names the product as Rejetto HTTP File Server.
Most families won’t have Rejetto HTTP File Server; it’s for whoever looks after IT at work.
Exploitation
CISA added it to its catalog of known exploited vulnerabilities on 9 Jul 2024, 39 days after it was made public. CISA lists a flaw only when it has reliable evidence of it being exploited, and gave US federal agencies until 30 Jul 2024 to fix it.[1] CISA says ransomware gangs have used it.
FIRST’s Exploit Prediction Scoring System, which estimates how likely a flaw is to be used in attacks in the next 30 days from what it sees across the internet, puts it at 99%. That’s in the top 1% of the flaws it scores.[4]
CISA assesses it as automatable: attackers can run it against many targets at once.
CISA doesn’t say who was attacked, or how.
Fix
Rejetto has published a fix or advice.[3] CISA’s required action: “Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.”[1]
- Check whether you use it.Rejetto HTTP File Server is business software or equipment, so most families won’t have it. If you run a business, or work from home on company equipment, ask whoever looks after your IT.
- Send this page to your IT person.Ask them to confirm it’s fixed, or not in use. CISA gave US government agencies until 30 Jul 2024 to fix it.
- If it can’t be fixed, take it offline.CISA’s advice when there’s no fix is to stop using the product, or take it off the internet, until there is one.
You can’t fix someone else’s server, but you can watch for what follows a break-in like this: a breach notice, a password reset you didn’t ask for, or a scam message that knows things it shouldn’t. HARD watches for those for you and your family.
Timeline
| Date | Event |
|---|---|
| The flaw is made public in the National Vulnerability Database, with a severity score of 9.8.[2] | |
| CISA adds it to its catalog of flaws known to be used in attacks, noting that ransomware gangs have used it.[1] | |
| CISA’s deadline for US government agencies to fix it.[1] | |
| FIRST puts the odds of it being used in attacks in the next 30 days at 99%.[4] |
See also
Other Rejetto flaws
- CVE-2014-6287, Rejetto HTTP File Server (HFS): remote code execution ·
Similar flaws
- CVE-2026-75650, Adobe Commerce and Magento: improper neutralization of special elements used in a template engine ·
- CVE-2024-4040, CrushFTP: VFS sandbox escape ·
Added the same day
- CVE-2024-38112, Microsoft Windows: MSHTML platform spoofing ·
- CVE-2024-38080, Microsoft Windows: hyper-V privilege escalation ·
References
- ^ Cybersecurity and Infrastructure Security Agency. “Rejetto HTTP File Server Improper Neutralization of Special Elements Used in a Template Engine Vulnerability”. Known Exploited Vulnerabilities Catalog, added 9 Jul 2024.
- ^ National Institute of Standards and Technology. “CVE-2024-23692 Detail”. National Vulnerability Database, published 31 May 2024.
- ^ Rejetto. Advisories and fixes: rejetto.com.
- ^ FIRST. “Exploit Prediction Scoring System”. EPSS 0.995, percentile 99.9, 31 Oct 2026.
- CVE Program. “CVE-2024-23692”. The official CVE record.
This article is built from CISA’s catalog (version 2026.10.30), NVD’s record and FIRST’s scores, kept in HARD’s database and checked every morning. The plain English is HARD’s.