by Kastro
Paper/Archive/CVE-2026-111687

CVE-2026-111687

rachelos we-mp-rss — WeRSS (we-mp-rss) through 1.5.3 RCE via template Parameter in /rss Endpoint

EPSS 1%public exploitCVSS 9.8
critical.is priorityof 100
52
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 62.8.628 × 2012.6Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

WeRSS (we-mp-rss) through 1.5.3 contains a remote code execution vulnerability that allows unauthenticated attackers to run code via the template parameter of the public GET /rss/{feed_id} endpoint. Attackers can supply a non-built-in ext value and a {{=expression}} template whose object-subclass traversal bypasses the eval denylist to run OS commands as the service account.

Affected

ProductAffectedFixed inSource
we-mp-rss≤ 1.5.3–CNA

Scores by source

VulnCheck (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
VulnCheck (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

exploithackmd.io/@hieuPenguinnn/werss-rss-template-unauth-ssti-rcewriteupgithub.com/rachelos/we-mp-rss/blob/v1.5.3/core/lax/template_parser.py#L1150-L1166writeupgithub.com/rachelos/we-mp-rss/blob/v1.5.3/apis/rss.py#L185-L198writeupvulncheck.com/advisories/werss-we-mp-rss-through-1.5.3-rce-via-template-parameter-in-rss-endpoint