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Fencer Vulns
medium 4.8

CVE-2022-42095 json

Cross-site Scripting in Backdrop CMS

published 2022-11-23 3 y ago modified 2026-06-17 4 mo ago also GHSA-58rj-w2qf-qjg7 , EUVD-2022-7237

cvss
4.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
2.2%
EPSS 2.2% chance of exploitation in 30 days, percentile 82%
public exploits
0
none known, plus a Nuclei check

Summary

Backdrop CMS version 1.23.0 was discovered to contain a stored cross-site scripting (XSS) vulnerability via the Page content.

Patch / fix

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
18 mo ago

Exploit prediction

2.20% chance of exploitation in the next 30 days, higher than 82% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • Nuclei template Backdrop CMS version 1.23.0 - Cross Site Scripting (Stored) nuclei detection template
  • grimthereaperteam.medium.com https://grimthereaperteam.medium.com/declined-backdrop-xss-at-pages-26e5d63686bc referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/bypazs/Declined_backdrop-XSS-at-pAGES referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 4.8 CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
NVD 3.1 4.8 CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
CNA 3.1 4.8 CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
GitHub 3.1 4.8 CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
packagist backdrop/backdrop
<=1.23.0
 no fix listed

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.