CVE-2021-31558
No exploitation reported by the sources we read.
- Published2021-12-22
- WeaknessCWE-79
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
DIAEnergie Version 1.7.5 and prior is vulnerable to stored cross-site scripting when an unauthenticated user injects arbitrary code into the parameter “descr” of the script “DIAE_hierarchyHandler.ashx”.
Timeline
dates in UTC- 2021-12-2219:15CVE publishedNVD
- 2026-10-2319:23EPSS crossed 10 %FIRST EPSS
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-31558?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-31558?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 1.7 | ≤ 1.7.5 | no fix published | NVD |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Vendor advisories
Delta Electronics DIAEnergie (Update C)
DIAEnergie: All versions prior to 1.9
Fix
- Mitigation from the vendor CISA ICSA-21-238-03 · 1 productDelta Electronics has fixed the reported vulnerabilities and recommends users upgrade to version 1.9 or later.
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
- CNACVSS 3.16.5read 2026-10-23
- NVDCVSS 3.16.1read 2026-10-23
- NVDCVSS 2.04.3read 2026-10-23
- CNAweakness (CWE)CWE-79read 2026-10-23
- FIRST EPSSEPSS score10.6 %read 2026-10-23
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- Published
- 2021-12-22
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2021-31558?
Is CVE-2021-31558 actively exploited?
What is the CVSS score for CVE-2021-31558?
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Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.